764278160689 has 2 divisors, whose sum is σ = 764278160690. Its totient is φ = 764278160688.

The previous prime is 764278160687. The next prime is 764278160719. The reversal of 764278160689 is 986061872467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 764036824464 + 241336225 = 874092^2 + 15535^2 .

It is a cyclic number.

It is not a de Polignac number, because 764278160689 - 2¹ = 764278160687 is a prime.

It is a super-2 number, since 2×764278160689² (a number of 25 digits) contains 22 as substring.

Together with 764278160687, 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 764278160689.

It is not a weakly prime, because it can be changed into another prime (764278160683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382139080344 + 382139080345.

It is an arithmetic number, because the mean of its divisors is an integer number (382139080345).

Almost surely, 2^764278160689 is an apocalyptic number.

It is an amenable number.

764278160689 is a deficient number, since it is larger than the sum of its proper divisors (1).

764278160689 is an equidigital number, since it uses as much as digits as its factorization.

764278160689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 64.

The spelling of 764278160689 in words is "seven hundred sixty-four billion, two hundred seventy-eight million, one hundred sixty thousand, six hundred eighty-nine".