12481171857 has 72 divisors (see below), whose sum is σ = 23616582912. Its totient is φ = 6274497600.

The previous prime is 12481171841. The next prime is 12481171891. The reversal of 12481171857 is 75817118421.

It is not a de Polignac number, because 12481171857 - 2⁴ = 12481171841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12481171837) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 108883 + ... + 191879.

It is an arithmetic number, because the mean of its divisors is an integer number (328008096).

Almost surely, 2^12481171857 is an apocalyptic number.

It is an amenable number.

12481171857 is a deficient number, since it is larger than the sum of its proper divisors (11135411055).

12481171857 is a wasteful number, since it uses less digits than its factorization.

12481171857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83059 (or 83049 counting only the distinct ones).

The product of its digits is 125440, while the sum is 45.

The spelling of 12481171857 in words is "twelve billion, four hundred eighty-one million, one hundred seventy-one thousand, eight hundred fifty-seven".