78080807780 has 12 divisors (see below), whose sum is σ = 163969696380. Its totient is φ = 31232323104.

The previous prime is 78080807771. The next prime is 78080807809. The reversal of 78080807780 is 8770808087.

It can be written as a sum of positive squares in 2 ways, for example, as 7939522816 + 70141284964 = 89104^2 + 264842^2 .

It is a super-2 number, since 2×78080807780² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1952020175 + ... + 1952020214.

It is an arithmetic number, because the mean of its divisors is an integer number (13664141365).

Almost surely, 2^78080807780 is an apocalyptic number.

It is an amenable number.

78080807780 is an abundant number, since it is smaller than the sum of its proper divisors (85888888600).

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

78080807780 is a wasteful number, since it uses less digits than its factorization.

78080807780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904040398 (or 3904040396 counting only the distinct ones).

The product of its (nonzero) digits is 1404928, while the sum is 53.

The spelling of 78080807780 in words is "seventy-eight billion, eighty million, eight hundred seven thousand, seven hundred eighty".