111685371257 has 16 divisors (see below), whose sum is σ = 118903554000. Its totient is φ = 104540405760.

The previous prime is 111685371229. The next prime is 111685371263. The reversal of 111685371257 is 752173586111.

It can be written as a sum of positive squares in 8 ways, for example, as 2470984681 + 109214386576 = 49709^2 + 330476^2 .

It is a cyclic number.

It is not a de Polignac number, because 111685371257 - 2²⁸ = 111416935801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111685371857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3132869 + ... + 3168317.

It is an arithmetic number, because the mean of its divisors is an integer number (7431472125).

Almost surely, 2^111685371257 is an apocalyptic number.

111685371257 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

111685371257 is a deficient number, since it is larger than the sum of its proper divisors (7218182743).

111685371257 is a wasteful number, since it uses less digits than its factorization.

111685371257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36476.

The product of its digits is 352800, while the sum is 47.

The spelling of 111685371257 in words is "one hundred eleven billion, six hundred eighty-five million, three hundred seventy-one thousand, two hundred fifty-seven".