1256938751325 has 12 divisors (see below), whose sum is σ = 2078138735648. Its totient is φ = 670367334000.

The previous prime is 1256938751309. The next prime is 1256938751333. The reversal of 1256938751325 is 5231578396521.

It is not a de Polignac number, because 1256938751325 - 2⁴ = 1256938751309 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8379591601 + ... + 8379591750.

Almost surely, 2^{1256938751325} is an apocalyptic number.

1256938751325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256938751325 is a deficient number, since it is larger than the sum of its proper divisors (821199984323).

1256938751325 is a wasteful number, since it uses less digits than its factorization.

1256938751325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16759183364 (or 16759183359 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 57.

The spelling of 1256938751325 in words is "one trillion, two hundred fifty-six billion, nine hundred thirty-eight million, seven hundred fifty-one thousand, three hundred twenty-five".