278862526655 has 12 divisors (see below), whose sum is σ = 346572077592. Its totient is φ = 215397258720.

The previous prime is 278862526627. The next prime is 278862526667. The reversal of 278862526655 is 556625268872.

It is not a de Polignac number, because 278862526655 - 2⁸ = 278862526399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33154241 + ... + 33162650.

It is an arithmetic number, because the mean of its divisors is an integer number (28881006466).

Almost surely, 2^278862526655 is an apocalyptic number.

278862526655 is a deficient number, since it is larger than the sum of its proper divisors (67709550937).

278862526655 is an equidigital number, since it uses as much as digits as its factorization.

278862526655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66316954 (or 66316925 counting only the distinct ones).

The product of its digits is 96768000, while the sum is 62.

The spelling of 278862526655 in words is "two hundred seventy-eight billion, eight hundred sixty-two million, five hundred twenty-six thousand, six hundred fifty-five".