123320252544555 has 64 divisors (see below), whose sum is σ = 215430196101120. Its totient is φ = 59741565811200.

The previous prime is 123320252544547. The next prime is 123320252544583. The reversal of 123320252544555 is 555445252023321.

It is a happy number.

It is not a de Polignac number, because 123320252544555 - 2³ = 123320252544547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1931283009 + ... + 1931346861.

It is an arithmetic number, because the mean of its divisors is an integer number (3366096814080).

Almost surely, 2^{123320252544555} is an apocalyptic number.

123320252544555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123320252544555 is a deficient number, since it is larger than the sum of its proper divisors (92109943556565).

123320252544555 is a wasteful number, since it uses less digits than its factorization.

123320252544555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73492.

The product of its (nonzero) digits is 7200000, while the sum is 48.

The spelling of 123320252544555 in words is "one hundred twenty-three trillion, three hundred twenty billion, two hundred fifty-two million, five hundred forty-four thousand, five hundred fifty-five".