278860225020 has 48 divisors (see below), whose sum is σ = 840870834720. Its totient is φ = 68642516736.

The previous prime is 278860225009. The next prime is 278860225097. The reversal of 278860225020 is 20522068872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178755775 + ... + 178757334.

It is an arithmetic number, because the mean of its divisors is an integer number (17518142390).

Almost surely, 2^278860225020 is an apocalyptic number.

278860225020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

278860225020 is an abundant number, since it is smaller than the sum of its proper divisors (562010609700).

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

278860225020 is a wasteful number, since it uses less digits than its factorization.

278860225020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357513134 (or 357513132 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 278860225020 in words is "two hundred seventy-eight billion, eight hundred sixty million, two hundred twenty-five thousand, twenty".