257439863111 has 4 divisors (see below), whose sum is σ = 266317099800. Its totient is φ = 248562626424.

The previous prime is 257439863089. The next prime is 257439863117. The reversal of 257439863111 is 111368934752.

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

It is a cyclic number.

It is not a de Polignac number, because 257439863111 - 2⁶ = 257439863047 is a prime.

It is a super-2 number, since 2×257439863111² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257439863111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257439863117) 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, 4438618301 + ... + 4438618358.

It is an arithmetic number, because the mean of its divisors is an integer number (66579274950).

Almost surely, 2^257439863111 is an apocalyptic number.

257439863111 is a deficient number, since it is larger than the sum of its proper divisors (8877236689).

257439863111 is an equidigital number, since it uses as much as digits as its factorization.

257439863111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8877236688.

The product of its digits is 1088640, while the sum is 50.

The spelling of 257439863111 in words is "two hundred fifty-seven billion, four hundred thirty-nine million, eight hundred sixty-three thousand, one hundred eleven".