764249038779 has 4 divisors (see below), whose sum is σ = 1018998718376. Its totient is φ = 509499359184.

The previous prime is 764249038759. The next prime is 764249038841. The reversal of 764249038779 is 977830942467.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 764249038779 - 2²⁴ = 764232261563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764249038759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127374839794 + ... + 127374839799.

It is an arithmetic number, because the mean of its divisors is an integer number (254749679594).

Almost surely, 2^764249038779 is an apocalyptic number.

764249038779 is a deficient number, since it is larger than the sum of its proper divisors (254749679597).

764249038779 is a wasteful number, since it uses less digits than its factorization.

764249038779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254749679596.

The product of its (nonzero) digits is 128024064, while the sum is 66.

The spelling of 764249038779 in words is "seven hundred sixty-four billion, two hundred forty-nine million, thirty-eight thousand, seven hundred seventy-nine".