621164057 has 8 divisors (see below), whose sum is σ = 627731520. Its totient is φ = 614607120.

The previous prime is 621164023. The next prime is 621164069. The reversal of 621164057 is 750461126.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 621164057 - 2⁸ = 621163801 is a prime.

It is a super-3 number, since 3×621164057³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621164087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182582 + ... + 185952.

It is an arithmetic number, because the mean of its divisors is an integer number (78466440).

Almost surely, 2^621164057 is an apocalyptic number.

It is an amenable number.

621164057 is a deficient number, since it is larger than the sum of its proper divisors (6567463).

621164057 is a wasteful number, since it uses less digits than its factorization.

621164057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 621164057 is about 24923.1630616982. The cubic root of 621164057 is about 853.2352171770.

The spelling of 621164057 in words is "six hundred twenty-one million, one hundred sixty-four thousand, fifty-seven".