278151272642 has 16 divisors (see below), whose sum is σ = 421863017400. Its totient is φ = 137535166080.

The previous prime is 278151272611. The next prime is 278151272671. The reversal of 278151272642 is 246272151872.

It can be written as a sum of positive squares in 4 ways, for example, as 202355125921 + 75796146721 = 449839^2 + 275311^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110917 + ... + 1338072.

Almost surely, 2^278151272642 is an apocalyptic number.

278151272642 is a deficient number, since it is larger than the sum of its proper divisors (143711744758).

278151272642 is a wasteful number, since it uses less digits than its factorization.

278151272642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449621.

The product of its digits is 752640, while the sum is 47.

The spelling of 278151272642 in words is "two hundred seventy-eight billion, one hundred fifty-one million, two hundred seventy-two thousand, six hundred forty-two".