1256135462625 has 32 divisors (see below), whose sum is σ = 2098342681344. Its totient is φ = 667332096000.

The previous prime is 1256135462609. The next prime is 1256135462657. The reversal of 1256135462625 is 5262645316521.

It is not a de Polignac number, because 1256135462625 - 2⁴ = 1256135462609 is a prime.

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, 6420541 + ... + 6613290.

It is an arithmetic number, because the mean of its divisors is an integer number (65573208792).

Almost surely, 2^{1256135462625} is an apocalyptic number.

1256135462625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256135462625 is a deficient number, since it is larger than the sum of its proper divisors (842207218719).

1256135462625 is a wasteful number, since it uses less digits than its factorization.

1256135462625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13034106 (or 13034096 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 48.

The spelling of 1256135462625 in words is "one trillion, two hundred fifty-six billion, one hundred thirty-five million, four hundred sixty-two thousand, six hundred twenty-five".