56373661 has 4 divisors (see below), whose sum is σ = 56426332. Its totient is φ = 56320992.

The previous prime is 56373641. The next prime is 56373677. The reversal of 56373661 is 16637365.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46172025 + 10201636 = 6795^2 + 3194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56373661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56373661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56373641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24696 + ... + 26881.

It is an arithmetic number, because the mean of its divisors is an integer number (14106583).

Almost surely, 2^56373661 is an apocalyptic number.

It is an amenable number.

56373661 is a deficient number, since it is larger than the sum of its proper divisors (52671).

56373661 is a wasteful number, since it uses less digits than its factorization.

56373661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52670.

The product of its digits is 68040, while the sum is 37.

The square root of 56373661 is about 7508.2395406646. The cubic root of 56373661 is about 383.4352887385.

The spelling of 56373661 in words is "fifty-six million, three hundred seventy-three thousand, six hundred sixty-one".