764525319721 has 8 divisors (see below), whose sum is σ = 772371799488. Its totient is φ = 756684270000.

The previous prime is 764525319713. The next prime is 764525319793. The reversal of 764525319721 is 127913525467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 764525319721 - 2³ = 764525319713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (764525389721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074175 + ... + 1637956.

It is an arithmetic number, because the mean of its divisors is an integer number (96546474936).

Almost surely, 2^764525319721 is an apocalyptic number.

It is an amenable number.

764525319721 is a deficient number, since it is larger than the sum of its proper divisors (7846479767).

764525319721 is a wasteful number, since it uses less digits than its factorization.

764525319721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715023.

The product of its digits is 3175200, while the sum is 52.

The spelling of 764525319721 in words is "seven hundred sixty-four billion, five hundred twenty-five million, three hundred nineteen thousand, seven hundred twenty-one".