65557715455 has 32 divisors (see below), whose sum is σ = 81091860480. Its totient is φ = 50857847040.

The previous prime is 65557715453. The next prime is 65557715477. The reversal of 65557715455 is 55451775556.

It is a happy number.

It is not a de Polignac number, because 65557715455 - 2¹ = 65557715453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65557715396 and 65557715405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65557715453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19240362 + ... + 19243768.

It is an arithmetic number, because the mean of its divisors is an integer number (2534120640).

Almost surely, 2^65557715455 is an apocalyptic number.

65557715455 is a deficient number, since it is larger than the sum of its proper divisors (15534145025).

65557715455 is a wasteful number, since it uses less digits than its factorization.

65557715455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4359.

The product of its digits is 18375000, while the sum is 55.

The spelling of 65557715455 in words is "sixty-five billion, five hundred fifty-seven million, seven hundred fifteen thousand, four hundred fifty-five".