764533745220 has 192 divisors, whose sum is σ = 2507497445376. Its totient is φ = 170407480320.

The previous prime is 764533745137. The next prime is 764533745231. The reversal of 764533745220 is 22547335467.

It is a self number, because there is not a number n which added to its sum of digits gives 764533745220.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11108715 + ... + 11177325.

It is an arithmetic number, because the mean of its divisors is an integer number (13059882528).

Almost surely, 2^764533745220 is an apocalyptic number.

764533745220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764533745220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253748722688).

764533745220 is an abundant number, since it is smaller than the sum of its proper divisors (1742963700156).

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

764533745220 is a wasteful number, since it uses less digits than its factorization.

764533745220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69290 (or 69288 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 48.

The spelling of 764533745220 in words is "seven hundred sixty-four billion, five hundred thirty-three million, seven hundred forty-five thousand, two hundred twenty".