64881460308451 has 2 divisors, whose sum is σ = 64881460308452. Its totient is φ = 64881460308450.

The previous prime is 64881460308443. The next prime is 64881460308463. The reversal of 64881460308451 is 15480306418846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64881460308451 - 2³ = 64881460308443 is a prime.

It is not a weakly prime, because it can be changed into another prime (64881460308551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32440730154225 + 32440730154226.

It is an arithmetic number, because the mean of its divisors is an integer number (32440730154226).

Almost surely, 2^{64881460308451} is an apocalyptic number.

64881460308451 is a deficient number, since it is larger than the sum of its proper divisors (1).

64881460308451 is an equidigital number, since it uses as much as digits as its factorization.

64881460308451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17694720, while the sum is 58.

The spelling of 64881460308451 in words is "sixty-four trillion, eight hundred eighty-one billion, four hundred sixty million, three hundred eight thousand, four hundred fifty-one".