621444878632 has 64 divisors (see below), whose sum is σ = 1255583704320. Its totient is φ = 287293298688.

The previous prime is 621444878623. The next prime is 621444878669. The reversal of 621444878632 is 236878444126.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3251188 + ... + 3437020.

It is an arithmetic number, because the mean of its divisors is an integer number (19618495380).

Almost surely, 2^621444878632 is an apocalyptic number.

It is an amenable number.

621444878632 is an abundant number, since it is smaller than the sum of its proper divisors (634138825688).

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

621444878632 is a wasteful number, since it uses less digits than its factorization.

621444878632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186290 (or 186286 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 55.

The spelling of 621444878632 in words is "six hundred twenty-one billion, four hundred forty-four million, eight hundred seventy-eight thousand, six hundred thirty-two".