123920505353128 has 16 divisors (see below), whose sum is σ = 253473760949760. Its totient is φ = 56327502433200.

The previous prime is 123920505353111. The next prime is 123920505353149. The reversal of 123920505353128 is 821353505029321.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704093780328 + ... + 704093780503.

It is an arithmetic number, because the mean of its divisors is an integer number (15842110059360).

Almost surely, 2^{123920505353128} is an apocalyptic number.

It is an amenable number.

123920505353128 is an abundant number, since it is smaller than the sum of its proper divisors (129553255596632).

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

123920505353128 is a wasteful number, since it uses less digits than its factorization.

123920505353128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408187560848 (or 1408187560844 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 123920505353128 in words is "one hundred twenty-three trillion, nine hundred twenty billion, five hundred five million, three hundred fifty-three thousand, one hundred twenty-eight".