23558733681 has 16 divisors (see below), whose sum is σ = 37057056768. Its totient is φ = 13027870800.

The previous prime is 23558733659. The next prime is 23558733703. The reversal of 23558733681 is 18633785532.

It is an interprime number because it is at equal distance from previous prime (23558733659) and next prime (23558733703).

It is not a de Polignac number, because 23558733681 - 2⁶ = 23558733617 is a prime.

It is a super-2 number, since 2×23558733681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23558733481) 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, 18093615 + ... + 18094916.

It is an arithmetic number, because the mean of its divisors is an integer number (2316066048).

Almost surely, 2^23558733681 is an apocalyptic number.

23558733681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23558733681 is a deficient number, since it is larger than the sum of its proper divisors (13498323087).

23558733681 is a wasteful number, since it uses less digits than its factorization.

23558733681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36188572.

The product of its digits is 3628800, while the sum is 51.

The spelling of 23558733681 in words is "twenty-three billion, five hundred fifty-eight million, seven hundred thirty-three thousand, six hundred eighty-one".