12778080220 has 12 divisors (see below), whose sum is σ = 26833968504. Its totient is φ = 5111232080.

The previous prime is 12778080197. The next prime is 12778080239. The reversal of 12778080220 is 2208087721.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12778080220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319451986 + ... + 319452025.

It is an arithmetic number, because the mean of its divisors is an integer number (2236164042).

Almost surely, 2^12778080220 is an apocalyptic number.

12778080220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12778080220 is an abundant number, since it is smaller than the sum of its proper divisors (14055888284).

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

12778080220 is a wasteful number, since it uses less digits than its factorization.

12778080220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638904020 (or 638904018 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 37.

The spelling of 12778080220 in words is "twelve billion, seven hundred seventy-eight million, eighty thousand, two hundred twenty".