776738568 has 64 divisors (see below), whose sum is σ = 2080935360. Its totient is φ = 240736256.

The previous prime is 776738561. The next prime is 776738579. The reversal of 776738568 is 865837677.

It is not an unprimeable number, because it can be changed into a prime (776738561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22396 + ... + 45332.

It is an arithmetic number, because the mean of its divisors is an integer number (32514615).

Almost surely, 2^776738568 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 776738568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1040467680).

776738568 is an abundant number, since it is smaller than the sum of its proper divisors (1304196792).

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

776738568 is a wasteful number, since it uses less digits than its factorization.

776738568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23046 (or 23042 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 57.

The square root of 776738568 is about 27870.0299246341. The cubic root of 776738568 is about 919.2316237176.

The spelling of 776738568 in words is "seven hundred seventy-six million, seven hundred thirty-eight thousand, five hundred sixty-eight".