764655841 has 2 divisors, whose sum is σ = 764655842. Its totient is φ = 764655840.

The previous prime is 764655839. The next prime is 764655851. The reversal of 764655841 is 148556467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 462035025 + 302620816 = 21495^2 + 17396^2 .

It is a cyclic number.

It is not a de Polignac number, because 764655841 - 2¹ = 764655839 is a prime.

Together with 764655839, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 764655791 and 764655800.

It is not a weakly prime, because it can be changed into another prime (764655851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382327920 + 382327921.

It is an arithmetic number, because the mean of its divisors is an integer number (382327921).

Almost surely, 2^764655841 is an apocalyptic number.

It is an amenable number.

764655841 is a deficient number, since it is larger than the sum of its proper divisors (1).

764655841 is an equidigital number, since it uses as much as digits as its factorization.

764655841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 46.

The square root of 764655841 is about 27652.4111245294. The cubic root of 764655841 is about 914.4402564550.

The spelling of 764655841 in words is "seven hundred sixty-four million, six hundred fifty-five thousand, eight hundred forty-one".