278372220056 has 32 divisors (see below), whose sum is σ = 596863200000. Its totient is φ = 119232120096.

The previous prime is 278372220043. The next prime is 278372220083. The reversal of 278372220056 is 650022273872.

It is a junction number, because it is equal to n+sod(n) for n = 278372219989 and 278372220016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1367756 + ... + 1558043.

It is an arithmetic number, because the mean of its divisors is an integer number (18651975000).

Almost surely, 2^278372220056 is an apocalyptic number.

It is an amenable number.

278372220056 is an abundant number, since it is smaller than the sum of its proper divisors (318490979944).

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

278372220056 is a wasteful number, since it uses less digits than its factorization.

278372220056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927511 (or 2927507 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 278372220056 in words is "two hundred seventy-eight billion, three hundred seventy-two million, two hundred twenty thousand, fifty-six".