23551771655 has 32 divisors (see below), whose sum is σ = 29457727488. Its totient is φ = 18062828800.

The previous prime is 23551771643. The next prime is 23551771673. The reversal of 23551771655 is 55617715532.

It is not a de Polignac number, because 23551771655 - 2¹⁸ = 23551509511 is a prime.

It is a super-2 number, since 2×23551771655² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3246242 + ... + 3253488.

It is an arithmetic number, because the mean of its divisors is an integer number (920553984).

Almost surely, 2^23551771655 is an apocalyptic number.

23551771655 is a deficient number, since it is larger than the sum of its proper divisors (5905955833).

23551771655 is a wasteful number, since it uses less digits than its factorization.

23551771655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7567.

The product of its digits is 1102500, while the sum is 47.

The spelling of 23551771655 in words is "twenty-three billion, five hundred fifty-one million, seven hundred seventy-one thousand, six hundred fifty-five".