623431430155 has 4 divisors (see below), whose sum is σ = 748117716192. Its totient is φ = 498745144120.

The previous prime is 623431430147. The next prime is 623431430177. The reversal of 623431430155 is 551034134326.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 623431430155 - 2³ = 623431430147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62343143011 + ... + 62343143020.

It is an arithmetic number, because the mean of its divisors is an integer number (187029429048).

Almost surely, 2^623431430155 is an apocalyptic number.

623431430155 is a deficient number, since it is larger than the sum of its proper divisors (124686286037).

623431430155 is a wasteful number, since it uses less digits than its factorization.

623431430155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124686286036.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 623431430155 in words is "six hundred twenty-three billion, four hundred thirty-one million, four hundred thirty thousand, one hundred fifty-five".