764809965 has 16 divisors (see below), whose sum is σ = 1359662400. Its totient is φ = 407898576.

The previous prime is 764809963. The next prime is 764809973. The reversal of 764809965 is 569908467.

764809965 is a `hidden beast` number, since 76 + 480 + 9 + 96 + 5 = 666.

It is not a de Polignac number, because 764809965 - 2¹ = 764809963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764809963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2832495 + ... + 2832764.

It is an arithmetic number, because the mean of its divisors is an integer number (84978900).

Almost surely, 2^764809965 is an apocalyptic number.

It is an amenable number.

764809965 is a deficient number, since it is larger than the sum of its proper divisors (594852435).

764809965 is a wasteful number, since it uses less digits than its factorization.

764809965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5665273 (or 5665267 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 764809965 is about 27655.1977935433. The cubic root of 764809965 is about 914.5016905079.

The spelling of 764809965 in words is "seven hundred sixty-four million, eight hundred nine thousand, nine hundred sixty-five".