111664511553 has 16 divisors (see below), whose sum is σ = 170161136640. Its totient is φ = 63806158416.

The previous prime is 111664511479. The next prime is 111664511557. The reversal of 111664511553 is 355115466111.

It is not a de Polignac number, because 111664511553 - 2⁸ = 111664511297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111664511557) 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, 728926 + ... + 868712.

It is an arithmetic number, because the mean of its divisors is an integer number (10635071040).

Almost surely, 2^111664511553 is an apocalyptic number.

It is an amenable number.

111664511553 is a deficient number, since it is larger than the sum of its proper divisors (58496625087).

111664511553 is a wasteful number, since it uses less digits than its factorization.

111664511553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177836.

The product of its digits is 54000, while the sum is 39.

Adding to 111664511553 its reverse (355115466111), we get a palindrome (466779977664).

The spelling of 111664511553 in words is "one hundred eleven billion, six hundred sixty-four million, five hundred eleven thousand, five hundred fifty-three".