64942612457 has 2 divisors, whose sum is σ = 64942612458. Its totient is φ = 64942612456.

The previous prime is 64942612453. The next prime is 64942612487. The reversal of 64942612457 is 75421624946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37436058256 + 27506554201 = 193484^2 + 165851^2 .

It is a cyclic number.

It is not a de Polignac number, because 64942612457 - 2² = 64942612453 is a prime.

It is not a weakly prime, because it can be changed into another prime (64942612453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32471306228 + 32471306229.

It is an arithmetic number, because the mean of its divisors is an integer number (32471306229).

Almost surely, 2^64942612457 is an apocalyptic number.

It is an amenable number.

64942612457 is a deficient number, since it is larger than the sum of its proper divisors (1).

64942612457 is an equidigital number, since it uses as much as digits as its factorization.

64942612457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 50.

The spelling of 64942612457 in words is "sixty-four billion, nine hundred forty-two million, six hundred twelve thousand, four hundred fifty-seven".