771933978608 has 80 divisors (see below), whose sum is σ = 1693934247936. Its totient is φ = 338103279360.

The previous prime is 771933978601. The next prime is 771933978617. The reversal of 771933978608 is 806879339177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771933978601) 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, 27698 + ... + 1242833.

Almost surely, 2^771933978608 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 771933978608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846967123968).

771933978608 is an abundant number, since it is smaller than the sum of its proper divisors (922000269328).

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

771933978608 is a wasteful number, since it uses less digits than its factorization.

771933978608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270702 (or 1270696 counting only the distinct ones).

The product of its (nonzero) digits is 96018048, while the sum is 68.

The spelling of 771933978608 in words is "seven hundred seventy-one billion, nine hundred thirty-three million, nine hundred seventy-eight thousand, six hundred eight".