764721650 has 96 divisors (see below), whose sum is σ = 1781885952. Its totient is φ = 237211200.

The previous prime is 764721649. The next prime is 764721653. The reversal of 764721650 is 56127467.

It is not an unprimeable number, because it can be changed into a prime (764721653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1181627 + ... + 1182273.

It is an arithmetic number, because the mean of its divisors is an integer number (18561312).

Almost surely, 2^764721650 is an apocalyptic number.

764721650 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

764721650 is an abundant number, since it is smaller than the sum of its proper divisors (1017164302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

764721650 is a wasteful number, since it uses less digits than its factorization.

764721650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 764721650 is about 27653.6010313304. The cubic root of 764721650 is about 914.4664890289.

The spelling of 764721650 in words is "seven hundred sixty-four million, seven hundred twenty-one thousand, six hundred fifty".