56404663 has 4 divisors (see below), whose sum is σ = 64462480. Its totient is φ = 48346848.

The previous prime is 56404661. The next prime is 56404669. The reversal of 56404663 is 36640465.

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

It is a cyclic number.

It is not a de Polignac number, because 56404663 - 2¹ = 56404661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56404661) 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, 4028898 + ... + 4028911.

It is an arithmetic number, because the mean of its divisors is an integer number (16115620).

Almost surely, 2^56404663 is an apocalyptic number.

56404663 is a deficient number, since it is larger than the sum of its proper divisors (8057817).

56404663 is an equidigital number, since it uses as much as digits as its factorization.

56404663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8057816.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 56404663 is about 7510.3037887958. The cubic root of 56404663 is about 383.5055643612.

The spelling of 56404663 in words is "fifty-six million, four hundred four thousand, six hundred sixty-three".