123345252031545 has 32 divisors (see below), whose sum is σ = 219345730329600. Its totient is φ = 65764549734912.

The previous prime is 123345252031499. The next prime is 123345252031579. The reversal of 123345252031545 is 545130252543321.

123345252031545 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 4 + 52 + 5 + 20 + 31 + 545 = 666.

It is not a de Polignac number, because 123345252031545 - 2⁸ = 123345252031289 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 123345252031545.

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, 135549592 + ... + 136456521.

It is an arithmetic number, because the mean of its divisors is an integer number (6854554072800).

Almost surely, 2^{123345252031545} is an apocalyptic number.

123345252031545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123345252031545 is a deficient number, since it is larger than the sum of its proper divisors (96000478298055).

123345252031545 is a wasteful number, since it uses less digits than its factorization.

123345252031545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272009486 (or 272009480 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 45.

The spelling of 123345252031545 in words is "one hundred twenty-three trillion, three hundred forty-five billion, two hundred fifty-two million, thirty-one thousand, five hundred forty-five".