1280542156272 has 30 divisors (see below), whose sum is σ = 3583739507192. Its totient is φ = 426847385376.

The previous prime is 1280542156259. The next prime is 1280542156301. The reversal of 1280542156272 is 2726512450821.

1280542156272 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 5 + 4 + 2 + 15 + 627 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4446326788 + ... + 4446327075.

Almost surely, 2^{1280542156272} is an apocalyptic number.

1280542156272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1280542156272 is an abundant number, since it is smaller than the sum of its proper divisors (2303197350920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280542156272 is a wasteful number, since it uses less digits than its factorization.

1280542156272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8892653877 (or 8892653868 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 1280542156272 in words is "one trillion, two hundred eighty billion, five hundred forty-two million, one hundred fifty-six thousand, two hundred seventy-two".