123531311064139 has 16 divisors (see below), whose sum is σ = 139133157166080. Its totient is φ = 108659366532000.

The previous prime is 123531311064097. The next prime is 123531311064149. The reversal of 123531311064139 is 931460113135321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123531311064139 - 2¹⁵ = 123531311031371 is a prime.

It is a super-2 number, since 2×123531311064139² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123531311064095 and 123531311064104.

It is not an unprimeable number, because it can be changed into a prime (123531311064149) 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, 30077872 + ... + 33937309.

It is an arithmetic number, because the mean of its divisors is an integer number (8695822322880).

Almost surely, 2^{123531311064139} is an apocalyptic number.

123531311064139 is a deficient number, since it is larger than the sum of its proper divisors (15601846101941).

123531311064139 is a wasteful number, since it uses less digits than its factorization.

123531311064139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64020882.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 123531311064139 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, three hundred eleven million, sixty-four thousand, one hundred thirty-nine".