278615055 has 16 divisors (see below), whose sum is σ = 446158944. Its totient is φ = 148469760.

The previous prime is 278615041. The next prime is 278615063. The reversal of 278615055 is 550516872.

It is not a de Polignac number, because 278615055 - 2⁶ = 278614991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12295 + ... + 26615.

It is an arithmetic number, because the mean of its divisors is an integer number (27884934).

Almost surely, 2^278615055 is an apocalyptic number.

278615055 is a deficient number, since it is larger than the sum of its proper divisors (167543889).

278615055 is a wasteful number, since it uses less digits than its factorization.

278615055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15626.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 278615055 is about 16691.7660839110. The cubic root of 278615055 is about 653.1328485279.

The spelling of 278615055 in words is "two hundred seventy-eight million, six hundred fifteen thousand, fifty-five".