772939856640 has 288 divisors, whose sum is σ = 2874466538496. Its totient is φ = 173338214400.

The previous prime is 772939856597. The next prime is 772939856669. The reversal of 772939856640 is 46658939277.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1153365 + ... + 1695915.

It is an arithmetic number, because the mean of its divisors is an integer number (9980786592).

Almost surely, 2^772939856640 is an apocalyptic number.

772939856640 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 772939856640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437233269248).

772939856640 is an abundant number, since it is smaller than the sum of its proper divisors (2101526681856).

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

772939856640 is a wasteful number, since it uses less digits than its factorization.

772939856640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542635 (or 542621 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 66.

The spelling of 772939856640 in words is "seven hundred seventy-two billion, nine hundred thirty-nine million, eight hundred fifty-six thousand, six hundred forty".