257493191912 has 16 divisors (see below), whose sum is σ = 526690620000. Its totient is φ = 117042359920.

The previous prime is 257493191911. The next prime is 257493191953. The reversal of 257493191912 is 219191394752.

It is not an unprimeable number, because it can be changed into a prime (257493191911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1463029412 + ... + 1463029587.

It is an arithmetic number, because the mean of its divisors is an integer number (32918163750).

Almost surely, 2^257493191912 is an apocalyptic number.

257493191912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

257493191912 is an abundant number, since it is smaller than the sum of its proper divisors (269197428088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257493191912 is a wasteful number, since it uses less digits than its factorization.

257493191912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926059016 (or 2926059012 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 53.

The spelling of 257493191912 in words is "two hundred fifty-seven billion, four hundred ninety-three million, one hundred ninety-one thousand, nine hundred twelve".