621845964 has 48 divisors (see below), whose sum is σ = 1613552640. Its totient is φ = 207107280.

The previous prime is 621845947. The next prime is 621845971. The reversal of 621845964 is 469548126.

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 15 ways as a sum of consecutive naturals, for example, 221409 + ... + 224199.

It is an arithmetic number, because the mean of its divisors is an integer number (33615680).

Almost surely, 2^621845964 is an apocalyptic number.

It is an amenable number.

621845964 is an abundant number, since it is smaller than the sum of its proper divisors (991706676).

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

621845964 is a wasteful number, since it uses less digits than its factorization.

621845964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4867 (or 4859 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 621845964 is about 24936.8394950122. The cubic root of 621845964 is about 853.5473270417.

The spelling of 621845964 in words is "six hundred twenty-one million, eight hundred forty-five thousand, nine hundred sixty-four".