257163537505241 has 4 divisors (see below), whose sum is σ = 272290804417332. Its totient is φ = 242036270593152.

The previous prime is 257163537505177. The next prime is 257163537505243. The reversal of 257163537505241 is 142505735361752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128668186240000 + 128495351265241 = 11343200^2 + 11335579^2 .

It is a cyclic number.

It is not a de Polignac number, because 257163537505241 - 2⁶ = 257163537505177 is a prime.

It is a super-2 number, since 2×257163537505241² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257163537505243) 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, 7563633456020 + ... + 7563633456053.

It is an arithmetic number, because the mean of its divisors is an integer number (68072701104333).

Almost surely, 2^{257163537505241} is an apocalyptic number.

It is an amenable number.

257163537505241 is a deficient number, since it is larger than the sum of its proper divisors (15127266912091).

257163537505241 is a wasteful number, since it uses less digits than its factorization.

257163537505241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15127266912090.

The product of its (nonzero) digits is 26460000, while the sum is 56.

The spelling of 257163537505241 in words is "two hundred fifty-seven trillion, one hundred sixty-three billion, five hundred thirty-seven million, five hundred five thousand, two hundred forty-one".