771320868 has 12 divisors (see below), whose sum is σ = 1799748720. Its totient is φ = 257106952.

The previous prime is 771320867. The next prime is 771320887. The reversal of 771320868 is 868023177.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (771320861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32138358 + ... + 32138381.

It is an arithmetic number, because the mean of its divisors is an integer number (149979060).

Almost surely, 2^771320868 is an apocalyptic number.

It is an amenable number.

771320868 is an abundant number, since it is smaller than the sum of its proper divisors (1028427852).

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

771320868 is a wasteful number, since it uses less digits than its factorization.

771320868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64276746 (or 64276744 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 771320868 is about 27772.6640421836. The cubic root of 771320868 is about 917.0894422417.

The spelling of 771320868 in words is "seven hundred seventy-one million, three hundred twenty thousand, eight hundred sixty-eight".