64615264632649 has 2 divisors, whose sum is σ = 64615264632650. Its totient is φ = 64615264632648.

The previous prime is 64615264632637. The next prime is 64615264632691. The reversal of 64615264632649 is 94623646251646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64615231489600 + 33143049 = 8038360^2 + 5757^2 .

It is a cyclic number.

It is not a de Polignac number, because 64615264632649 - 2¹⁵ = 64615264599881 is a prime.

It is not a weakly prime, because it can be changed into another prime (64615264638649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32307632316324 + 32307632316325.

It is an arithmetic number, because the mean of its divisors is an integer number (32307632316325).

Almost surely, 2^{64615264632649} is an apocalyptic number.

It is an amenable number.

64615264632649 is a deficient number, since it is larger than the sum of its proper divisors (1).

64615264632649 is an equidigital number, since it uses as much as digits as its factorization.

64615264632649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268738560, while the sum is 64.

The spelling of 64615264632649 in words is "sixty-four trillion, six hundred fifteen billion, two hundred sixty-four million, six hundred thirty-two thousand, six hundred forty-nine".