1257013818825 has 24 divisors (see below), whose sum is σ = 2081803401888. Its totient is φ = 669265255680.

The previous prime is 1257013818743. The next prime is 1257013818881. The reversal of 1257013818825 is 5288183107521.

It is not a de Polignac number, because 1257013818825 - 2¹⁴ = 1257013802441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14232112 + ... + 14320161.

It is an arithmetic number, because the mean of its divisors is an integer number (86741808412).

Almost surely, 2^{1257013818825} is an apocalyptic number.

1257013818825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1257013818825 is a deficient number, since it is larger than the sum of its proper divisors (824789583063).

1257013818825 is a wasteful number, since it uses less digits than its factorization.

1257013818825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28552873 (or 28552868 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 51.

The spelling of 1257013818825 in words is "one trillion, two hundred fifty-seven billion, thirteen million, eight hundred eighteen thousand, eight hundred twenty-five".