257902171557109 has 8 divisors (see below), whose sum is σ = 266227891603200. Its totient is φ = 249576844958400.

The previous prime is 257902171557091. The next prime is 257902171557113. The reversal of 257902171557109 is 901755171209752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257902171557109 - 2¹⁷ = 257902171426037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257902171557809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97029412 + ... + 99651949.

It is an arithmetic number, because the mean of its divisors is an integer number (33278486450400).

Almost surely, 2^{257902171557109} is an apocalyptic number.

It is an amenable number.

257902171557109 is a deficient number, since it is larger than the sum of its proper divisors (8325720046091).

257902171557109 is a wasteful number, since it uses less digits than its factorization.

257902171557109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196723691.

The product of its (nonzero) digits is 13891500, while the sum is 61.

The spelling of 257902171557109 in words is "two hundred fifty-seven trillion, nine hundred two billion, one hundred seventy-one million, five hundred fifty-seven thousand, one hundred nine".