56640063 has 4 divisors (see below), whose sum is σ = 75520088. Its totient is φ = 37760040.

The previous prime is 56640049. The next prime is 56640097. The reversal of 56640063 is 36004665.

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

It is not a de Polignac number, because 56640063 - 2¹⁰ = 56639039 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 56640063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56640013) 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, 9440008 + ... + 9440013.

It is an arithmetic number, because the mean of its divisors is an integer number (18880022).

Almost surely, 2^56640063 is an apocalyptic number.

56640063 is a deficient number, since it is larger than the sum of its proper divisors (18880025).

56640063 is a wasteful number, since it uses less digits than its factorization.

56640063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18880024.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 56640063 is about 7525.9592744048. The cubic root of 56640063 is about 384.0383330331.

The spelling of 56640063 in words is "fifty-six million, six hundred forty thousand, sixty-three".