764720650 has 24 divisors (see below), whose sum is σ = 1423123200. Its totient is φ = 305728560.

The previous prime is 764720611. The next prime is 764720657. The reversal of 764720650 is 56027467.

It is not an unprimeable number, because it can be changed into a prime (764720657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156951 + ... + 161749.

It is an arithmetic number, because the mean of its divisors is an integer number (59296800).

Almost surely, 2^764720650 is an apocalyptic number.

764720650 is a deficient number, since it is larger than the sum of its proper divisors (658402550).

764720650 is a wasteful number, since it uses less digits than its factorization.

764720650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7998 (or 7993 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 764720650 is about 27653.5829504967. The cubic root of 764720650 is about 914.4660904233.

The spelling of 764720650 in words is "seven hundred sixty-four million, seven hundred twenty thousand, six hundred fifty".