764157969 has 24 divisors (see below), whose sum is σ = 1146355392. Its totient is φ = 508686480.

The previous prime is 764157943. The next prime is 764158027. The reversal of 764157969 is 969751467.

764157969 is a `hidden beast` number, since 7 + 6 + 4 + 1 + 579 + 69 = 666.

It is not a de Polignac number, because 764157969 - 2⁷ = 764157841 is a prime.

It is a super-2 number, since 2×764157969² = 1167874803172409922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (764157169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198079 + ... + 201899.

It is an arithmetic number, because the mean of its divisors is an integer number (47764808).

Almost surely, 2^764157969 is an apocalyptic number.

It is an amenable number.

764157969 is a deficient number, since it is larger than the sum of its proper divisors (382197423).

764157969 is an equidigital number, since it uses as much as digits as its factorization.

764157969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659 (or 4647 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 764157969 is about 27643.4073333951. The cubic root of 764157969 is about 914.2417475218.

The spelling of 764157969 in words is "seven hundred sixty-four million, one hundred fifty-seven thousand, nine hundred sixty-nine".