77490372313 has 2 divisors, whose sum is σ = 77490372314. Its totient is φ = 77490372312.

The previous prime is 77490372259. The next prime is 77490372409. The reversal of 77490372313 is 31327309477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63034638489 + 14455733824 = 251067^2 + 120232^2 .

It is a cyclic number.

It is not a de Polignac number, because 77490372313 - 2²⁵ = 77456817881 is a prime.

It is not a weakly prime, because it can be changed into another prime (77490372013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38745186156 + 38745186157.

It is an arithmetic number, because the mean of its divisors is an integer number (38745186157).

Almost surely, 2^77490372313 is an apocalyptic number.

It is an amenable number.

77490372313 is a deficient number, since it is larger than the sum of its proper divisors (1).

77490372313 is an equidigital number, since it uses as much as digits as its factorization.

77490372313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 46.

The spelling of 77490372313 in words is "seventy-seven billion, four hundred ninety million, three hundred seventy-two thousand, three hundred thirteen".