56621601 has 24 divisors (see below), whose sum is σ = 84974760. Its totient is φ = 36288000.

The previous prime is 56621573. The next prime is 56621623. The reversal of 56621601 is 10612665.

It is a happy number.

56621601 is a `hidden beast` number, since 56 + 6 + 2 + 1 + 601 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 23270976 + 33350625 = 4824^2 + 5775^2 .

It is not a de Polignac number, because 56621601 - 2¹⁴ = 56605217 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 104391 + ... + 104931.

It is an arithmetic number, because the mean of its divisors is an integer number (3540615).

Almost surely, 2^56621601 is an apocalyptic number.

It is an amenable number.

56621601 is a deficient number, since it is larger than the sum of its proper divisors (28353159).

56621601 is a wasteful number, since it uses less digits than its factorization.

56621601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 56621601 is about 7524.7326198344. The cubic root of 56621601 is about 383.9966023462.

The spelling of 56621601 in words is "fifty-six million, six hundred twenty-one thousand, six hundred one".