257651545241 has 4 divisors (see below), whose sum is σ = 257666015952. Its totient is φ = 257637074532.

The previous prime is 257651545219. The next prime is 257651545253. The reversal of 257651545241 is 142545156752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257651545241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257651545201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7208615 + ... + 7244268.

It is an arithmetic number, because the mean of its divisors is an integer number (64416503988).

Almost surely, 2^257651545241 is an apocalyptic number.

It is an amenable number.

257651545241 is a deficient number, since it is larger than the sum of its proper divisors (14470711).

257651545241 is a wasteful number, since it uses less digits than its factorization.

257651545241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14470710.

The product of its digits is 1680000, while the sum is 47.

The spelling of 257651545241 in words is "two hundred fifty-seven billion, six hundred fifty-one million, five hundred forty-five thousand, two hundred forty-one".