123305513534055 has 24 divisors (see below), whose sum is σ = 221099541511680. Its totient is φ = 63495252945600.

The previous prime is 123305513534003. The next prime is 123305513534057. The reversal of 123305513534055 is 550435315503321.

123305513534055 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 0 + 55 + 13 + 534 + 0 + 55 = 666.

It is not a de Polignac number, because 123305513534055 - 2¹² = 123305513529959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 123305513534055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123305513534057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47243490471 + ... + 47243493080.

It is an arithmetic number, because the mean of its divisors is an integer number (9212480896320).

Almost surely, 2^{123305513534055} is an apocalyptic number.

123305513534055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123305513534055 is a deficient number, since it is larger than the sum of its proper divisors (97794027977625).

123305513534055 is a wasteful number, since it uses less digits than its factorization.

123305513534055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94486983591 (or 94486983588 counting only the distinct ones).

The product of its (nonzero) digits is 2025000, while the sum is 45.

The spelling of 123305513534055 in words is "one hundred twenty-three trillion, three hundred five billion, five hundred thirteen million, five hundred thirty-four thousand, fifty-five".