56637643 has 2 divisors, whose sum is σ = 56637644. Its totient is φ = 56637642.

The previous prime is 56637631. The next prime is 56637671. The reversal of 56637643 is 34673665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56637643 - 2⁹ = 56637131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56637596 and 56637605.

It is not a weakly prime, because it can be changed into another prime (56637673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28318821 + 28318822.

It is an arithmetic number, because the mean of its divisors is an integer number (28318822).

Almost surely, 2^56637643 is an apocalyptic number.

56637643 is a deficient number, since it is larger than the sum of its proper divisors (1).

56637643 is an equidigital number, since it uses as much as digits as its factorization.

56637643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 40.

The square root of 56637643 is about 7525.7984958408. The cubic root of 56637643 is about 384.0328634888.

The spelling of 56637643 in words is "fifty-six million, six hundred thirty-seven thousand, six hundred forty-three".