645434100215124 has 96 divisors (see below), whose sum is σ = 1732009136847360. Its totient is φ = 185011764854400.

The previous prime is 645434100215081. The next prime is 645434100215173. The reversal of 645434100215124 is 421512001434546.

It is a congruent number.

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, 193009474 + ... + 196325049.

It is an arithmetic number, because the mean of its divisors is an integer number (18041761842160).

Almost surely, 2^{645434100215124} is an apocalyptic number.

It is an amenable number.

645434100215124 is an abundant number, since it is smaller than the sum of its proper divisors (1086575036632236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645434100215124 is a wasteful number, since it uses less digits than its factorization.

645434100215124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389335221 (or 389335219 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 645434100215124 in words is "six hundred forty-five trillion, four hundred thirty-four billion, one hundred million, two hundred fifteen thousand, one hundred twenty-four".