278226668882 has 6 divisors (see below), whose sum is σ = 417341122263. Its totient is φ = 139112961462.

The previous prime is 278226668879. The next prime is 278226668887. The reversal of 278226668882 is 288866622872.

It can be written as a sum of positive squares in only one way, i.e., 139113334441 + 139113334441 = 372979^2 + 372979^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=372979.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278226668887) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 559469 + ... + 932447.

Almost surely, 2^278226668882 is an apocalyptic number.

278226668882 is a deficient number, since it is larger than the sum of its proper divisors (139114453381).

278226668882 is an frugal number, since it uses more digits than its factorization.

278226668882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745960 (or 372981 counting only the distinct ones).

The product of its digits is 99090432, while the sum is 65.

The spelling of 278226668882 in words is "two hundred seventy-eight billion, two hundred twenty-six million, six hundred sixty-eight thousand, eight hundred eighty-two".