78799771080 has 80 divisors (see below), whose sum is σ = 264854797020. Its totient is φ = 21013271424.

The previous prime is 78799771027. The next prime is 78799771111. The reversal of 78799771080 is 8017799787.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78535578564 + 264192516 = 280242^2 + 16254^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78799770999 and 78799771017.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12157219 + ... + 12163698.

Almost surely, 2^78799771080 is an apocalyptic number.

It is an amenable number.

78799771080 is an abundant number, since it is smaller than the sum of its proper divisors (186055025940).

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

78799771080 is a wasteful number, since it uses less digits than its factorization.

78799771080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24320940 (or 24320927 counting only the distinct ones).

The product of its (nonzero) digits is 12446784, while the sum is 63.

The spelling of 78799771080 in words is "seventy-eight billion, seven hundred ninety-nine million, seven hundred seventy-one thousand, eighty".