257193949237 has 16 divisors (see below), whose sum is σ = 270220843008. Its totient is φ = 244321585200.

The previous prime is 257193949223. The next prime is 257193949247. The reversal of 257193949237 is 732949391752.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257193949237 is a prime.

It is a super-2 number, since 2×257193949237² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257193949247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20564328 + ... + 20576830.

It is an arithmetic number, because the mean of its divisors is an integer number (16888802688).

Almost surely, 2^257193949237 is an apocalyptic number.

It is an amenable number.

257193949237 is a deficient number, since it is larger than the sum of its proper divisors (13026893771).

257193949237 is a wasteful number, since it uses less digits than its factorization.

257193949237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18600.

The product of its digits is 25719120, while the sum is 61.

The spelling of 257193949237 in words is "two hundred fifty-seven billion, one hundred ninety-three million, nine hundred forty-nine thousand, two hundred thirty-seven".