1278833878856 has 16 divisors (see below), whose sum is σ = 2456296780140. Its totient is φ = 623821404160.

The previous prime is 1278833878789. The next prime is 1278833878867. The reversal of 1278833878856 is 6588783388721.

It can be written as a sum of positive squares in 2 ways, for example, as 1264972584100 + 13861294756 = 1124710^2 + 117734^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1949441561 + ... + 1949442216.

Almost surely, 2^{1278833878856} is an apocalyptic number.

It is an amenable number.

1278833878856 is a deficient number, since it is larger than the sum of its proper divisors (1177462901284).

1278833878856 is a wasteful number, since it uses less digits than its factorization.

1278833878856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898883824 (or 3898883820 counting only the distinct ones).

The product of its digits is 867041280, while the sum is 74.

The spelling of 1278833878856 in words is "one trillion, two hundred seventy-eight billion, eight hundred thirty-three million, eight hundred seventy-eight thousand, eight hundred fifty-six".