115655661556566 has 32 divisors (see below), whose sum is σ = 239915089258848. Its totient is φ = 37138558694400.

The previous prime is 115655661556517. The next prime is 115655661556601. The reversal of 115655661556566 is 665655166556511.

It is a super-3 number, since 3×115655661556566³ (a number of 43 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115655661556566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2579044155 + ... + 2579088998.

It is an arithmetic number, because the mean of its divisors is an integer number (7497346539339).

Almost surely, 2^{115655661556566} is an apocalyptic number.

115655661556566 is an abundant number, since it is smaller than the sum of its proper divisors (124259427702282).

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

115655661556566 is a wasteful number, since it uses less digits than its factorization.

115655661556566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158133296.

The product of its digits is 729000000, while the sum is 69.

The spelling of 115655661556566 in words is "one hundred fifteen trillion, six hundred fifty-five billion, six hundred sixty-one million, five hundred fifty-six thousand, five hundred sixty-six".