621234664 has 16 divisors (see below), whose sum is σ = 1181221920. Its totient is φ = 306242160.

The previous prime is 621234641. The next prime is 621234671. The reversal of 621234664 is 466432126.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546294 + ... + 547429.

It is an arithmetic number, because the mean of its divisors is an integer number (73826370).

Almost surely, 2^621234664 is an apocalyptic number.

It is an amenable number.

621234664 is a deficient number, since it is larger than the sum of its proper divisors (559987256).

621234664 is a wasteful number, since it uses less digits than its factorization.

621234664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093800 (or 1093796 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The square root of 621234664 is about 24924.5795150089. The cubic root of 621234664 is about 853.2675447056.

The spelling of 621234664 in words is "six hundred twenty-one million, two hundred thirty-four thousand, six hundred sixty-four".