764645913 has 14 divisors (see below), whose sum is σ = 1146445514. Its totient is φ = 509763456.

The previous prime is 764645887. The next prime is 764645933. The reversal of 764645913 is 319546467.

It can be written as a sum of positive squares in only one way, i.e., 752514624 + 12131289 = 27432^2 + 3483^2 .

It is not a de Polignac number, because 764645913 - 2⁸ = 764645657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764645933) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 523720 + ... + 525177.

Almost surely, 2^764645913 is an apocalyptic number.

It is an amenable number.

764645913 is a deficient number, since it is larger than the sum of its proper divisors (381799601).

764645913 is an equidigital number, since it uses as much as digits as its factorization.

764645913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048915 (or 1048900 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 764645913 is about 27652.2316097634. The cubic root of 764645913 is about 914.4362988566.

The spelling of 764645913 in words is "seven hundred sixty-four million, six hundred forty-five thousand, nine hundred thirteen".