56165390663 has 2 divisors, whose sum is σ = 56165390664. Its totient is φ = 56165390662.

The previous prime is 56165390639. The next prime is 56165390669. The reversal of 56165390663 is 36609356165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56165390663 - 2¹⁶ = 56165325127 is a prime.

It is a super-2 number, since 2×56165390663² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56165390669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28082695331 + 28082695332.

It is an arithmetic number, because the mean of its divisors is an integer number (28082695332).

Almost surely, 2^56165390663 is an apocalyptic number.

56165390663 is a deficient number, since it is larger than the sum of its proper divisors (1).

56165390663 is an equidigital number, since it uses as much as digits as its factorization.

56165390663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 50.

The spelling of 56165390663 in words is "fifty-six billion, one hundred sixty-five million, three hundred ninety thousand, six hundred sixty-three".