123818356502080 has 56 divisors (see below), whose sum is σ = 297451686829752. Its totient is φ = 49089047519232.

The previous prime is 123818356502069. The next prime is 123818356502101. The reversal of 123818356502080 is 80205653818321.

It can be written as a sum of positive squares in 4 ways, for example, as 5942517801984 + 117875838700096 = 2437728^2 + 10857064^2 .

It is a super-2 number, since 2×123818356502080² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712053947 + ... + 1712126266.

It is an arithmetic number, because the mean of its divisors is an integer number (5311637264817).

Almost surely, 2^{123818356502080} is an apocalyptic number.

123818356502080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123818356502080 is an abundant number, since it is smaller than the sum of its proper divisors (173633330327672).

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

123818356502080 is a wasteful number, since it uses less digits than its factorization.

123818356502080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424180343 (or 3424180333 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 52.

The spelling of 123818356502080 in words is "one hundred twenty-three trillion, eight hundred eighteen billion, three hundred fifty-six million, five hundred two thousand, eighty".