56171622643387 has 2 divisors, whose sum is σ = 56171622643388. Its totient is φ = 56171622643386.

The previous prime is 56171622643327. The next prime is 56171622643393. The reversal of 56171622643387 is 78334622617165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56171622643387 - 2²⁷ = 56171488425659 is a prime.

It is not a weakly prime, because it can be changed into another prime (56171622643327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28085811321693 + 28085811321694.

It is an arithmetic number, because the mean of its divisors is an integer number (28085811321694).

Almost surely, 2^{56171622643387} is an apocalyptic number.

56171622643387 is a deficient number, since it is larger than the sum of its proper divisors (1).

56171622643387 is an equidigital number, since it uses as much as digits as its factorization.

56171622643387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 61.

The spelling of 56171622643387 in words is "fifty-six trillion, one hundred seventy-one billion, six hundred twenty-two million, six hundred forty-three thousand, three hundred eighty-seven".