111331871553 has 64 divisors (see below), whose sum is σ = 181224243200. Its totient is φ = 59382823680.

The previous prime is 111331871549. The next prime is 111331871587. The reversal of 111331871553 is 355178133111.

It is not a de Polignac number, because 111331871553 - 2² = 111331871549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111331873553) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7864800 + ... + 7878942.

It is an arithmetic number, because the mean of its divisors is an integer number (2831628800).

Almost surely, 2^111331871553 is an apocalyptic number.

It is an amenable number.

111331871553 is a deficient number, since it is larger than the sum of its proper divisors (69892371647).

111331871553 is a wasteful number, since it uses less digits than its factorization.

111331871553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14462.

The product of its digits is 37800, while the sum is 39.

The spelling of 111331871553 in words is "one hundred eleven billion, three hundred thirty-one million, eight hundred seventy-one thousand, five hundred fifty-three".