278139082825 has 12 divisors (see below), whose sum is σ = 348448058140. Its totient is φ = 220217333760.

The previous prime is 278139082817. The next prime is 278139082901. The reversal of 278139082825 is 528280931872.

It can be written as a sum of positive squares in 6 ways, for example, as 8363664 + 278130719161 = 2892^2 + 527381^2 .

It is not a de Polignac number, because 278139082825 - 2³ = 278139082817 is a prime.

It is a super-2 number, since 2×278139082825² (a number of 24 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 57345840 + ... + 57350689.

Almost surely, 2^278139082825 is an apocalyptic number.

278139082825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

278139082825 is a deficient number, since it is larger than the sum of its proper divisors (70308975315).

278139082825 is a wasteful number, since it uses less digits than its factorization.

278139082825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114696636 (or 114696631 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 278139082825 in words is "two hundred seventy-eight billion, one hundred thirty-nine million, eighty-two thousand, eight hundred twenty-five".