123313310253440 has 64 divisors (see below), whose sum is σ = 294821797649760. Its totient is φ = 49320987942912.

The previous prime is 123313310253383. The next prime is 123313310253457. The reversal of 123313310253440 is 44352013313321.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×123313310253440² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123313310253440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178249 + ... + 15748488.

Almost surely, 2^{123313310253440} is an apocalyptic number.

123313310253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123313310253440 is an abundant number, since it is smaller than the sum of its proper divisors (171508487396320).

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

123313310253440 is a wasteful number, since it uses less digits than its factorization.

123313310253440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16938139 (or 16938127 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 123313310253440 its reverse (44352013313321), we get a palindrome (167665323566761).

The spelling of 123313310253440 in words is "one hundred twenty-three trillion, three hundred thirteen billion, three hundred ten million, two hundred fifty-three thousand, four hundred forty".