56645599 has 2 divisors, whose sum is σ = 56645600. Its totient is φ = 56645598.

The previous prime is 56645543. The next prime is 56645609. The reversal of 56645599 is 99554665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56645599 - 2⁷ = 56645471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56645509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28322799 + 28322800.

It is an arithmetic number, because the mean of its divisors is an integer number (28322800).

Almost surely, 2^56645599 is an apocalyptic number.

56645599 is a deficient number, since it is larger than the sum of its proper divisors (1).

56645599 is an equidigital number, since it uses as much as digits as its factorization.

56645599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458000, while the sum is 49.

The square root of 56645599 is about 7526.3270590641. The cubic root of 56645599 is about 384.0508445949.

The spelling of 56645599 in words is "fifty-six million, six hundred forty-five thousand, five hundred ninety-nine".