278431426281 has 16 divisors (see below), whose sum is σ = 393111595008. Its totient is φ = 174687878400.

The previous prime is 278431426219. The next prime is 278431426283. The reversal of 278431426281 is 182624134872.

278431426281 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 278431426281 - 2¹⁷ = 278431295209 is a prime.

It is a super-2 number, since 2×278431426281² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 278431426281.

It is not an unprimeable number, because it can be changed into a prime (278431426283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430791 + ... + 861651.

It is an arithmetic number, because the mean of its divisors is an integer number (24569474688).

Almost surely, 2^278431426281 is an apocalyptic number.

It is an amenable number.

278431426281 is a deficient number, since it is larger than the sum of its proper divisors (114680168727).

278431426281 is a wasteful number, since it uses less digits than its factorization.

278431426281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443552.

The product of its digits is 1032192, while the sum is 48.

The spelling of 278431426281 in words is "two hundred seventy-eight billion, four hundred thirty-one million, four hundred twenty-six thousand, two hundred eighty-one".