621326564 has 12 divisors (see below), whose sum is σ = 1088667888. Its totient is φ = 310278600.

The previous prime is 621326561. The next prime is 621326569. The reversal of 621326564 is 465623126.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (621326561) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 92522 + ... + 99009.

It is an arithmetic number, because the mean of its divisors is an integer number (90722324).

Almost surely, 2^621326564 is an apocalyptic number.

It is an amenable number.

621326564 is a deficient number, since it is larger than the sum of its proper divisors (467341324).

621326564 is a wasteful number, since it uses less digits than its factorization.

621326564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192346 (or 192344 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 621326564 is about 24926.4230085265. The cubic root of 621326564 is about 853.3096175999.

The spelling of 621326564 in words is "six hundred twenty-one million, three hundred twenty-six thousand, five hundred sixty-four".