123154525400055 has 16 divisors (see below), whose sum is σ = 201239735122944. Its totient is φ = 64284915385760.

The previous prime is 123154525400021. The next prime is 123154525400117. The reversal of 123154525400055 is 550004525451321.

It is a happy number.

It is not a de Polignac number, because 123154525400055 - 2²⁷ = 123154391182327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87343634331 + ... + 87343635740.

It is an arithmetic number, because the mean of its divisors is an integer number (12577483445184).

Almost surely, 2^{123154525400055} is an apocalyptic number.

123154525400055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123154525400055 is a deficient number, since it is larger than the sum of its proper divisors (78085209722889).

123154525400055 is a wasteful number, since it uses less digits than its factorization.

123154525400055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174687270126.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 123154525400055 in words is "one hundred twenty-three trillion, one hundred fifty-four billion, five hundred twenty-five million, four hundred thousand, fifty-five".