115521137457 has 16 divisors (see below), whose sum is σ = 168969473280. Its totient is φ = 69621674000.

The previous prime is 115521137453. The next prime is 115521137467. The reversal of 115521137457 is 754731125511.

It is a cyclic number.

It is not a de Polignac number, because 115521137457 - 2² = 115521137453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115521137453) 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 15 ways as a sum of consecutive naturals, for example, 9772419 + ... + 9784232.

It is an arithmetic number, because the mean of its divisors is an integer number (10560592080).

Almost surely, 2^115521137457 is an apocalyptic number.

It is an amenable number.

115521137457 is a deficient number, since it is larger than the sum of its proper divisors (53448335823).

115521137457 is a wasteful number, since it uses less digits than its factorization.

115521137457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19556844.

The product of its digits is 147000, while the sum is 42.

The spelling of 115521137457 in words is "one hundred fifteen billion, five hundred twenty-one million, one hundred thirty-seven thousand, four hundred fifty-seven".