764657749538 has 16 divisors (see below), whose sum is σ = 1158355463616. Its totient is φ = 378540755760.

The previous prime is 764657749517. The next prime is 764657749561. The reversal of 764657749538 is 835947756467.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659648 + ... + 1401588.

It is an arithmetic number, because the mean of its divisors is an integer number (72397216476).

Almost surely, 2^764657749538 is an apocalyptic number.

764657749538 is a deficient number, since it is larger than the sum of its proper divisors (393697714078).

764657749538 is a wasteful number, since it uses less digits than its factorization.

764657749538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747049.

The product of its digits is 1066867200, while the sum is 71.

The spelling of 764657749538 in words is "seven hundred sixty-four billion, six hundred fifty-seven million, seven hundred forty-nine thousand, five hundred thirty-eight".