621545476 has 12 divisors (see below), whose sum is σ = 1087925580. Its totient is φ = 310709600.

The previous prime is 621545453. The next prime is 621545489. The reversal of 621545476 is 674545126.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 442681600 + 178863876 = 21040^2 + 13374^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11670 + ... + 37138.

It is an arithmetic number, because the mean of its divisors is an integer number (90660465).

Almost surely, 2^621545476 is an apocalyptic number.

It is an amenable number.

621545476 is a deficient number, since it is larger than the sum of its proper divisors (466380104).

621545476 is a wasteful number, since it uses less digits than its factorization.

621545476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31574 (or 31572 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The square root of 621545476 is about 24930.8137853541. The cubic root of 621545476 is about 853.4098213638.

The spelling of 621545476 in words is "six hundred twenty-one million, five hundred forty-five thousand, four hundred seventy-six".