621327645 has 64 divisors (see below), whose sum is σ = 1231200000. Its totient is φ = 295446528.

The previous prime is 621327631. The next prime is 621327667. The reversal of 621327645 is 546723126.

621327645 is a `hidden beast` number, since 6 + 2 + 1 + 3 + 2 + 7 + 645 = 666.

It is not a de Polignac number, because 621327645 - 2¹¹ = 621325597 is a prime.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 36481 + ... + 50729.

It is an arithmetic number, because the mean of its divisors is an integer number (19237500).

Almost surely, 2^621327645 is an apocalyptic number.

It is an amenable number.

621327645 is a deficient number, since it is larger than the sum of its proper divisors (609872355).

621327645 is a wasteful number, since it uses less digits than its factorization.

621327645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14299 (or 14293 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 621327645 is about 24926.4446923343. Note that the first 3 decimals coincide. The cubic root of 621327645 is about 853.3101124697.

The spelling of 621327645 in words is "six hundred twenty-one million, three hundred twenty-seven thousand, six hundred forty-five".