56642621576089 has 2 divisors, whose sum is σ = 56642621576090. Its totient is φ = 56642621576088.

The previous prime is 56642621576059. The next prime is 56642621576141. The reversal of 56642621576089 is 98067512624665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39083940441225 + 17558681134864 = 6251715^2 + 4190308^2 .

It is a cyclic number.

It is not a de Polignac number, because 56642621576089 - 2¹⁹ = 56642621051801 is a prime.

It is a super-2 number, since 2×56642621576089² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56642621576059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28321310788044 + 28321310788045.

It is an arithmetic number, because the mean of its divisors is an integer number (28321310788045).

Almost surely, 2^{56642621576089} is an apocalyptic number.

It is an amenable number.

56642621576089 is a deficient number, since it is larger than the sum of its proper divisors (1).

56642621576089 is an equidigital number, since it uses as much as digits as its factorization.

56642621576089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 261273600, while the sum is 67.

The spelling of 56642621576089 in words is "fifty-six trillion, six hundred forty-two billion, six hundred twenty-one million, five hundred seventy-six thousand, eighty-nine".