1256713901880 has 128 divisors (see below), whose sum is σ = 3822023361600. Its totient is φ = 330530816000.

The previous prime is 1256713901851. The next prime is 1256713901909. The reversal of 1256713901880 is 881093176521.

It is an interprime number because it is at equal distance from previous prime (1256713901851) and next prime (1256713901909).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4135960 + ... + 4429400.

Almost surely, 2^{1256713901880} is an apocalyptic number.

1256713901880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1256713901880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1911011680800).

1256713901880 is an abundant number, since it is smaller than the sum of its proper divisors (2565309459720).

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

1256713901880 is a wasteful number, since it uses less digits than its factorization.

1256713901880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293945 (or 293941 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 1256713901880 in words is "one trillion, two hundred fifty-six billion, seven hundred thirteen million, nine hundred one thousand, eight hundred eighty".