278681207130 has 80 divisors (see below), whose sum is σ = 749439694080. Its totient is φ = 74305379808.

The previous prime is 278681207117. The next prime is 278681207153. The reversal of 278681207130 is 31702186872.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8056011 + ... + 8090529.

It is an arithmetic number, because the mean of its divisors is an integer number (9367996176).

Almost surely, 2^278681207130 is an apocalyptic number.

278681207130 is an abundant number, since it is smaller than the sum of its proper divisors (470758486950).

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

278681207130 is a wasteful number, since it uses less digits than its factorization.

278681207130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44505 (or 44496 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 278681207130 in words is "two hundred seventy-eight billion, six hundred eighty-one million, two hundred seven thousand, one hundred thirty".