764258593921 has 2 divisors, whose sum is σ = 764258593922. Its totient is φ = 764258593920.

The previous prime is 764258593919. The next prime is 764258593933. The reversal of 764258593921 is 129395852467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451531585521 + 312727008400 = 671961^2 + 559220^2 .

It is a cyclic number.

It is not a de Polignac number, because 764258593921 - 2¹ = 764258593919 is a prime.

Together with 764258593919, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 764258593921.

It is not a weakly prime, because it can be changed into another prime (764258593981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382129296960 + 382129296961.

It is an arithmetic number, because the mean of its divisors is an integer number (382129296961).

Almost surely, 2^764258593921 is an apocalyptic number.

It is an amenable number.

764258593921 is a deficient number, since it is larger than the sum of its proper divisors (1).

764258593921 is an equidigital number, since it uses as much as digits as its factorization.

764258593921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32659200, while the sum is 61.

The spelling of 764258593921 in words is "seven hundred sixty-four billion, two hundred fifty-eight million, five hundred ninety-three thousand, nine hundred twenty-one".