56166400233239 has 2 divisors, whose sum is σ = 56166400233240. Its totient is φ = 56166400233238.

The previous prime is 56166400233149. The next prime is 56166400233283. The reversal of 56166400233239 is 93233200466165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56166400233239 is a prime.

It is a super-2 number, since 2×56166400233239² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56166400233299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28083200116619 + 28083200116620.

It is an arithmetic number, because the mean of its divisors is an integer number (28083200116620).

Almost surely, 2^{56166400233239} is an apocalyptic number.

56166400233239 is a deficient number, since it is larger than the sum of its proper divisors (1).

56166400233239 is an equidigital number, since it uses as much as digits as its factorization.

56166400233239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 50.

The spelling of 56166400233239 in words is "fifty-six trillion, one hundred sixty-six billion, four hundred million, two hundred thirty-three thousand, two hundred thirty-nine".