64531177608563 has 2 divisors, whose sum is σ = 64531177608564. Its totient is φ = 64531177608562.

The previous prime is 64531177608553. The next prime is 64531177608607. The reversal of 64531177608563 is 36580677113546.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64531177608563 - 2⁴⁴ = 46938991564147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64531177608496 and 64531177608505.

It is not a weakly prime, because it can be changed into another prime (64531177608523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32265588804281 + 32265588804282.

It is an arithmetic number, because the mean of its divisors is an integer number (32265588804282).

Almost surely, 2^{64531177608563} is an apocalyptic number.

64531177608563 is a deficient number, since it is larger than the sum of its proper divisors (1).

64531177608563 is an equidigital number, since it uses as much as digits as its factorization.

64531177608563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76204800, while the sum is 62.

The spelling of 64531177608563 in words is "sixty-four trillion, five hundred thirty-one billion, one hundred seventy-seven million, six hundred eight thousand, five hundred sixty-three".