621324045 has 24 divisors (see below), whose sum is σ = 1103232312. Its totient is φ = 323289600.

The previous prime is 621323999. The next prime is 621324061. The reversal of 621324045 is 540423126.

621324045 is a `hidden beast` number, since 621 + 32 + 4 + 0 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 94070601 + 527253444 = 9699^2 + 22962^2 .

It is not a de Polignac number, because 621324045 - 2⁶ = 621323981 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166536 + ... + 170225.

It is an arithmetic number, because the mean of its divisors is an integer number (45968013).

Almost surely, 2^621324045 is an apocalyptic number.

It is an amenable number.

621324045 is a deficient number, since it is larger than the sum of its proper divisors (481908267).

621324045 is a wasteful number, since it uses less digits than its factorization.

621324045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336813 (or 336810 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 621324045 is about 24926.3724797653. The cubic root of 621324045 is about 853.3084644276.

The spelling of 621324045 in words is "six hundred twenty-one million, three hundred twenty-four thousand, forty-five".