23115511377 has 128 divisors (see below), whose sum is σ = 40883404800. Its totient is φ = 12636684288.

The previous prime is 23115511357. The next prime is 23115511381. The reversal of 23115511377 is 77311551132.

23115511377 is a `hidden beast` number, since 2 + 31 + 1 + 551 + 1 + 3 + 77 = 666.

It is not a de Polignac number, because 23115511377 - 2⁷ = 23115511249 is a prime.

It is a super-2 number, since 2×23115511377² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23115511357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 119769393 + ... + 119769585.

It is an arithmetic number, because the mean of its divisors is an integer number (319401600).

Almost surely, 2^23115511377 is an apocalyptic number.

23115511377 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

23115511377 is a deficient number, since it is larger than the sum of its proper divisors (17767893423).

23115511377 is a wasteful number, since it uses less digits than its factorization.

23115511377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 486 counting only the distinct ones).

The product of its digits is 22050, while the sum is 36.

The spelling of 23115511377 in words is "twenty-three billion, one hundred fifteen million, five hundred eleven thousand, three hundred seventy-seven".