1257693938825 has 6 divisors (see below), whose sum is σ = 1559540484174. Its totient is φ = 1006155151040.

The previous prime is 1257693938807. The next prime is 1257693938857. The reversal of 1257693938825 is 5288393967521.

It can be written as a sum of positive squares in 3 ways, for example, as 239328380944 + 1018365557881 = 489212^2 + 1009141^2 .

It is not a de Polignac number, because 1257693938825 - 2³² = 1253398971529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25153878752 + ... + 25153878801.

It is an arithmetic number, because the mean of its divisors is an integer number (259923414029).

Almost surely, 2^{1257693938825} is an apocalyptic number.

It is an amenable number.

1257693938825 is a deficient number, since it is larger than the sum of its proper divisors (301846545349).

1257693938825 is an equidigital number, since it uses as much as digits as its factorization.

1257693938825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50307757563 (or 50307757558 counting only the distinct ones).

The product of its digits is 195955200, while the sum is 68.

The spelling of 1257693938825 in words is "one trillion, two hundred fifty-seven billion, six hundred ninety-three million, nine hundred thirty-eight thousand, eight hundred twenty-five".