56621646 has 16 divisors (see below), whose sum is σ = 125826000. Its totient is φ = 18873864.

The previous prime is 56621641. The next prime is 56621657. The reversal of 56621646 is 64612665.

It is a happy number.

56621646 is a `hidden beast` number, since 5 + 6 + 6 + 2 + 1 + 646 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 56621646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56621641) 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, 524221 + ... + 524328.

It is an arithmetic number, because the mean of its divisors is an integer number (7864125).

Almost surely, 2^56621646 is an apocalyptic number.

56621646 is an abundant number, since it is smaller than the sum of its proper divisors (69204354).

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

56621646 is a wasteful number, since it uses less digits than its factorization.

56621646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048560 (or 1048554 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 56621646 is about 7524.7356099733. The cubic root of 56621646 is about 383.9967040733.

The spelling of 56621646 in words is "fifty-six million, six hundred twenty-one thousand, six hundred forty-six".