56371587169 has 2 divisors, whose sum is σ = 56371587170. Its totient is φ = 56371587168.

The previous prime is 56371587161. The next prime is 56371587203. The reversal of 56371587169 is 96178517365.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42650510400 + 13721076769 = 206520^2 + 117137^2 .

It is a cyclic number.

It is not a de Polignac number, because 56371587169 - 2³ = 56371587161 is a prime.

It is a super-2 number, since 2×56371587169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56371587161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28185793584 + 28185793585.

It is an arithmetic number, because the mean of its divisors is an integer number (28185793585).

Almost surely, 2^56371587169 is an apocalyptic number.

It is an amenable number.

56371587169 is a deficient number, since it is larger than the sum of its proper divisors (1).

56371587169 is an equidigital number, since it uses as much as digits as its factorization.

56371587169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9525600, while the sum is 58.

The spelling of 56371587169 in words is "fifty-six billion, three hundred seventy-one million, five hundred eighty-seven thousand, one hundred sixty-nine".