115660557 has 12 divisors (see below), whose sum is σ = 171581020. Its totient is φ = 75022848.

The previous prime is 115660547. The next prime is 115660577. The reversal of 115660557 is 755066511.

It can be written as a sum of positive squares in 2 ways, for example, as 100520676 + 15139881 = 10026^2 + 3891^2 .

It is not a de Polignac number, because 115660557 - 2⁴ = 115660541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115660507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173332 + ... + 173997.

Almost surely, 2^115660557 is an apocalyptic number.

It is an amenable number.

115660557 is a deficient number, since it is larger than the sum of its proper divisors (55920463).

115660557 is a wasteful number, since it uses less digits than its factorization.

115660557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347372 (or 347369 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 115660557 is about 10754.5598236283. The cubic root of 115660557 is about 487.2237235368.

The spelling of 115660557 in words is "one hundred fifteen million, six hundred sixty thousand, five hundred fifty-seven".