764678531273 has 2 divisors, whose sum is σ = 764678531274. Its totient is φ = 764678531272.

The previous prime is 764678531261. The next prime is 764678531371. The reversal of 764678531273 is 372135876467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533348314249 + 231330217024 = 730307^2 + 480968^2 .

It is a cyclic number.

It is not a de Polignac number, because 764678531273 - 2²⁸ = 764410095817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (764678521273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382339265636 + 382339265637.

It is an arithmetic number, because the mean of its divisors is an integer number (382339265637).

Almost surely, 2^764678531273 is an apocalyptic number.

It is an amenable number.

764678531273 is a deficient number, since it is larger than the sum of its proper divisors (1).

764678531273 is an equidigital number, since it uses as much as digits as its factorization.

764678531273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 59.

The spelling of 764678531273 in words is "seven hundred sixty-four billion, six hundred seventy-eight million, five hundred thirty-one thousand, two hundred seventy-three".