123155278494336 has 384 divisors, whose sum is σ = 400191462216000. Its totient is φ = 36010324869120.

The previous prime is 123155278494299. The next prime is 123155278494349. The reversal of 123155278494336 is 633494872551321.

123155278494336 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 552 + 7 + 8 + 4 + 9 + 43 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 591184051 + ... + 591392333.

Almost surely, 2^{123155278494336} is an apocalyptic number.

123155278494336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123155278494336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200095731108000).

123155278494336 is an abundant number, since it is smaller than the sum of its proper divisors (277036183721664).

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

123155278494336 is a wasteful number, since it uses less digits than its factorization.

123155278494336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209952 (or 209937 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 63.

The spelling of 123155278494336 in words is "one hundred twenty-three trillion, one hundred fifty-five billion, two hundred seventy-eight million, four hundred ninety-four thousand, three hundred thirty-six".