621377568 has 240 divisors, whose sum is σ = 2180787840. Its totient is φ = 169703424.

The previous prime is 621377527. The next prime is 621377623. The reversal of 621377568 is 865773126.

621377568 is a `hidden beast` number, since 6 + 2 + 13 + 77 + 568 = 666.

It is a super-2 number, since 2×621377568² = 772220164027189248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 416568 + ... + 418056.

It is an arithmetic number, because the mean of its divisors is an integer number (9086616).

Almost surely, 2^621377568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621377568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1090393920).

621377568 is an abundant number, since it is smaller than the sum of its proper divisors (1559410272).

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

621377568 is a wasteful number, since it uses less digits than its factorization.

621377568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1524 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 621377568 is about 24927.4460785697. The cubic root of 621377568 is about 853.3329660372.

The spelling of 621377568 in words is "six hundred twenty-one million, three hundred seventy-seven thousand, five hundred sixty-eight".