11601655611525 has 96 divisors (see below), whose sum is σ = 24358445126400. Its totient is φ = 5303373004800.

The previous prime is 11601655611521. The next prime is 11601655611529. The reversal of 11601655611525 is 52511655610611.

11601655611525 is a `hidden beast` number, since 1 + 1 + 6 + 0 + 1 + 6 + 5 + 5 + 611 + 5 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (11601655611521) and next prime (11601655611529).

It is not a de Polignac number, because 11601655611525 - 2² = 11601655611521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11601655611521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 142470021 + ... + 142551429.

It is an arithmetic number, because the mean of its divisors is an integer number (253733803400).

Almost surely, 2^{11601655611525} is an apocalyptic number.

11601655611525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11601655611525 is an abundant number, since it is smaller than the sum of its proper divisors (12756789514875).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11601655611525 is a wasteful number, since it uses less digits than its factorization.

11601655611525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111596 (or 111585 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 45.

The spelling of 11601655611525 in words is "eleven trillion, six hundred one billion, six hundred fifty-five million, six hundred eleven thousand, five hundred twenty-five".