764163644 has 12 divisors (see below), whose sum is σ = 1339568664. Its totient is φ = 381429744.

The previous prime is 764163643. The next prime is 764163691. The reversal of 764163644 is 446361467.

764163644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×764163644² = 1167892149622717472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764163643) 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, 160379 + ... + 165074.

It is an arithmetic number, because the mean of its divisors is an integer number (111630722).

Almost surely, 2^764163644 is an apocalyptic number.

It is an amenable number.

764163644 is a deficient number, since it is larger than the sum of its proper divisors (575405020).

764163644 is a wasteful number, since it uses less digits than its factorization.

764163644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326044 (or 326042 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The square root of 764163644 is about 27643.5099797403. The cubic root of 764163644 is about 914.2440107140.

The spelling of 764163644 in words is "seven hundred sixty-four million, one hundred sixty-three thousand, six hundred forty-four".