123242355433545 has 32 divisors (see below), whose sum is σ = 204896668975104. Its totient is φ = 63187706232000.

The previous prime is 123242355433499. The next prime is 123242355433573. The reversal of 123242355433545 is 545334553242321.

It is not a de Polignac number, because 123242355433545 - 2²⁶ = 123242288324681 is a prime.

It is a super-2 number, since 2×123242355433545² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 877536817 + ... + 877677246.

It is an arithmetic number, because the mean of its divisors is an integer number (6403020905472).

Almost surely, 2^{123242355433545} is an apocalyptic number.

123242355433545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123242355433545 is a deficient number, since it is larger than the sum of its proper divisors (81654313541559).

123242355433545 is a wasteful number, since it uses less digits than its factorization.

123242355433545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755214253.

The product of its digits is 25920000, while the sum is 51.

The spelling of 123242355433545 in words is "one hundred twenty-three trillion, two hundred forty-two billion, three hundred fifty-five million, four hundred thirty-three thousand, five hundred forty-five".