278054315985 has 16 divisors (see below), whose sum is σ = 455737806720. Its totient is φ = 144678668160.

The previous prime is 278054315971. The next prime is 278054316011. The reversal of 278054315985 is 589513450872.

It is not a de Polignac number, because 278054315985 - 2¹¹ = 278054313937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226059805 + ... + 226061034.

It is an arithmetic number, because the mean of its divisors is an integer number (28483612920).

Almost surely, 2^278054315985 is an apocalyptic number.

It is an amenable number.

278054315985 is a deficient number, since it is larger than the sum of its proper divisors (177683490735).

278054315985 is a wasteful number, since it uses less digits than its factorization.

278054315985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452120888.

The product of its (nonzero) digits is 12096000, while the sum is 57.

The spelling of 278054315985 in words is "two hundred seventy-eight billion, fifty-four million, three hundred fifteen thousand, nine hundred eighty-five".