623644449904 has 80 divisors (see below), whose sum is σ = 1386142432000. Its totient is φ = 266268529152.

The previous prime is 623644449887. The next prime is 623644449991. The reversal of 623644449904 is 409944446326.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36042247 + ... + 36059545.

It is an arithmetic number, because the mean of its divisors is an integer number (17326780400).

Almost surely, 2^623644449904 is an apocalyptic number.

It is an amenable number.

623644449904 is an abundant number, since it is smaller than the sum of its proper divisors (762497982096).

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

623644449904 is a wasteful number, since it uses less digits than its factorization.

623644449904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18510 (or 18504 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 55.

The spelling of 623644449904 in words is "six hundred twenty-three billion, six hundred forty-four million, four hundred forty-nine thousand, nine hundred four".