764625236321 has 2 divisors, whose sum is σ = 764625236322. Its totient is φ = 764625236320.

The previous prime is 764625236317. The next prime is 764625236381. The reversal of 764625236321 is 123632526467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757658830096 + 6966406225 = 870436^2 + 83465^2 .

It is a cyclic number.

It is not a de Polignac number, because 764625236321 - 2² = 764625236317 is a prime.

It is not a weakly prime, because it can be changed into another prime (764625236381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382312618160 + 382312618161.

It is an arithmetic number, because the mean of its divisors is an integer number (382312618161).

Almost surely, 2^764625236321 is an apocalyptic number.

It is an amenable number.

764625236321 is a deficient number, since it is larger than the sum of its proper divisors (1).

764625236321 is an equidigital number, since it uses as much as digits as its factorization.

764625236321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 47.

The spelling of 764625236321 in words is "seven hundred sixty-four billion, six hundred twenty-five million, two hundred thirty-six thousand, three hundred twenty-one".