115657205557 has 4 divisors (see below), whose sum is σ = 115658966016. Its totient is φ = 115655445100.

The previous prime is 115657205483. The next prime is 115657205567. The reversal of 115657205557 is 755502756511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115657205557 - 2¹¹ = 115657203509 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115657205557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115657205567) 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 3 ways as a sum of consecutive naturals, for example, 777703 + ... + 914404.

It is an arithmetic number, because the mean of its divisors is an integer number (28914741504).

Almost surely, 2^115657205557 is an apocalyptic number.

It is an amenable number.

115657205557 is a deficient number, since it is larger than the sum of its proper divisors (1760459).

115657205557 is an equidigital number, since it uses as much as digits as its factorization.

115657205557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760458.

The product of its (nonzero) digits is 1837500, while the sum is 49.

The spelling of 115657205557 in words is "one hundred fifteen billion, six hundred fifty-seven million, two hundred five thousand, five hundred fifty-seven".