64511231422961 has 2 divisors, whose sum is σ = 64511231422962. Its totient is φ = 64511231422960.

The previous prime is 64511231422931. The next prime is 64511231423033. The reversal of 64511231422961 is 16922413211546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57105452944225 + 7405778478736 = 7556815^2 + 2721356^2 .

It is a cyclic number.

It is not a de Polignac number, because 64511231422961 - 2³⁴ = 64494051553777 is a prime.

It is not a weakly prime, because it can be changed into another prime (64511231422921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32255615711480 + 32255615711481.

It is an arithmetic number, because the mean of its divisors is an integer number (32255615711481).

Almost surely, 2^{64511231422961} is an apocalyptic number.

It is an amenable number.

64511231422961 is a deficient number, since it is larger than the sum of its proper divisors (1).

64511231422961 is an equidigital number, since it uses as much as digits as its factorization.

64511231422961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 47.

The spelling of 64511231422961 in words is "sixty-four trillion, five hundred eleven billion, two hundred thirty-one million, four hundred twenty-two thousand, nine hundred sixty-one".