764322697728 has 390 divisors, whose sum is σ = 2334764197689. Its totient is φ = 249967171584.

The previous prime is 764322697711. The next prime is 764322697729. The reversal of 764322697728 is 827796223467.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

764322697728 is a `hidden beast` number, since 76 + 432 + 2 + 69 + 7 + 72 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 725004566784 + 39318130944 = 851472^2 + 198288^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=618192.

It is not an unprimeable number, because it can be changed into a prime (764322697729) by changing a digit.

It is a polite number, since it can be written in 38 ways as a sum of consecutive naturals, for example, 14421182950 + ... + 14421183002.

Almost surely, 2^764322697728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764322697728

764322697728 is an abundant number, since it is smaller than the sum of its proper divisors (1570441499961).

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

764322697728 is an frugal number, since it uses more digits than its factorization.

764322697728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 58 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 63.

The spelling of 764322697728 in words is "seven hundred sixty-four billion, three hundred twenty-two million, six hundred ninety-seven thousand, seven hundred twenty-eight".