123310331656164 has 72 divisors (see below), whose sum is σ = 313331417719320. Its totient is φ = 40888826265600.

The previous prime is 123310331656123. The next prime is 123310331656189. The reversal of 123310331656164 is 461656133013321.

It is a happy number.

123310331656164 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 10 + 3 + 3 + 16 + 5 + 616 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1244117160000 + 122066214496164 = 1115400^2 + 11048358^2 .

It is a super-2 number, since 2×123310331656164² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410484 + ... + 15709524.

Almost surely, 2^{123310331656164} is an apocalyptic number.

It is an amenable number.

123310331656164 is an abundant number, since it is smaller than the sum of its proper divisors (190021086063156).

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

123310331656164 is a wasteful number, since it uses less digits than its factorization.

123310331656164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15300221 (or 15300216 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

Adding to 123310331656164 its reverse (461656133013321), we get a palindrome (584966464669485).

The spelling of 123310331656164 in words is "one hundred twenty-three trillion, three hundred ten billion, three hundred thirty-one million, six hundred fifty-six thousand, one hundred sixty-four".