764189161 has 4 divisors (see below), whose sum is σ = 768765312. Its totient is φ = 759613012.

The previous prime is 764189159. The next prime is 764189171. The reversal of 764189161 is 161981467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 764189161 - 2¹ = 764189159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764189131) 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, 2287825 + ... + 2288158.

It is an arithmetic number, because the mean of its divisors is an integer number (192191328).

Almost surely, 2^764189161 is an apocalyptic number.

It is an amenable number.

764189161 is a deficient number, since it is larger than the sum of its proper divisors (4576151).

764189161 is a wasteful number, since it uses less digits than its factorization.

764189161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576150.

The product of its digits is 72576, while the sum is 43.

The square root of 764189161 is about 27643.9715127910. The cubic root of 764189161 is about 914.2541867651.

The spelling of 764189161 in words is "seven hundred sixty-four million, one hundred eighty-nine thousand, one hundred sixty-one".