1280656832013 has 120 divisors (see below), whose sum is σ = 2095211048832. Its totient is φ = 779136164352.

The previous prime is 1280656831901. The next prime is 1280656832047. The reversal of 1280656832013 is 3102386560821.

1280656832013 is a `hidden beast` number, since 1 + 2 + 80 + 6 + 568 + 3 + 2 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 1280656832013 - 2¹⁷ = 1280656700941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1280656832013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280656832083) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 809005420 + ... + 809007002.

Almost surely, 2^{1280656832013} is an apocalyptic number.

1280656832013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1280656832013 is a deficient number, since it is larger than the sum of its proper divisors (814554216819).

1280656832013 is a wasteful number, since it uses less digits than its factorization.

1280656832013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 1280656832013 in words is "one trillion, two hundred eighty billion, six hundred fifty-six million, eight hundred thirty-two thousand, thirteen".