123636446866656 has 96 divisors (see below), whose sum is σ = 360640814395680. Its totient is φ = 41208204837888.

The previous prime is 123636446866463. The next prime is 123636446866687. The reversal of 123636446866656 is 656668644636321.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×123636446866656² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2192650 + ... + 15877046.

It is an arithmetic number, because the mean of its divisors is an integer number (3756675149955).

Almost surely, 2^{123636446866656} is an apocalyptic number.

123636446866656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123636446866656 is an abundant number, since it is smaller than the sum of its proper divisors (237004367529024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123636446866656 is a wasteful number, since it uses less digits than its factorization.

123636446866656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13694873 (or 13694859 counting only the distinct ones).

The product of its digits is 3224862720, while the sum is 72.

The spelling of 123636446866656 in words is "one hundred twenty-three trillion, six hundred thirty-six billion, four hundred forty-six million, eight hundred sixty-six thousand, six hundred fifty-six".