257705142018 has 16 divisors (see below), whose sum is σ = 515562318336. Its totient is φ = 85876374960.

The previous prime is 257705142011. The next prime is 257705142031. The reversal of 257705142018 is 810241507752.

It is a super-2 number, since 2×257705142018² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257705142011) 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, 6312721 + ... + 6353412.

It is an arithmetic number, because the mean of its divisors is an integer number (32222644896).

Almost surely, 2^257705142018 is an apocalyptic number.

257705142018 is an abundant number, since it is smaller than the sum of its proper divisors (257857176318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257705142018 is a wasteful number, since it uses less digits than its factorization.

257705142018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12669529.

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 257705142018 in words is "two hundred fifty-seven billion, seven hundred five million, one hundred forty-two thousand, eighteen".