123055501555 has 32 divisors (see below), whose sum is σ = 188093698560. Its totient is φ = 75237465600.

The previous prime is 123055501489. The next prime is 123055501561. The reversal of 123055501555 is 555105550321.

It is not a de Polignac number, because 123055501555 - 2⁷ = 123055501427 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5431221 + ... + 5453830.

It is an arithmetic number, because the mean of its divisors is an integer number (5877928080).

Almost surely, 2^123055501555 is an apocalyptic number.

123055501555 is a deficient number, since it is larger than the sum of its proper divisors (65038197005).

123055501555 is a wasteful number, since it uses less digits than its factorization.

123055501555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10885099.

The product of its (nonzero) digits is 93750, while the sum is 37.

The spelling of 123055501555 in words is "one hundred twenty-three billion, fifty-five million, five hundred one thousand, five hundred fifty-five".