278132243208 has 32 divisors (see below), whose sum is σ = 697552130400. Its totient is φ = 92414544768.

The previous prime is 278132243197. The next prime is 278132243239. The reversal of 278132243208 is 802342231872.

It is a self number, because there is not a number n which added to its sum of digits gives 278132243208.

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, 18505018 + ... + 18520041.

It is an arithmetic number, because the mean of its divisors is an integer number (21798504075).

Almost surely, 2^278132243208 is an apocalyptic number.

It is an amenable number.

278132243208 is an abundant number, since it is smaller than the sum of its proper divisors (419419887192).

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

278132243208 is a wasteful number, since it uses less digits than its factorization.

278132243208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37025381 (or 37025377 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 278132243208 in words is "two hundred seventy-eight billion, one hundred thirty-two million, two hundred forty-three thousand, two hundred eight".