2257142816857 has 2 divisors, whose sum is σ = 2257142816858. Its totient is φ = 2257142816856.

The previous prime is 2257142816849. The next prime is 2257142816861. The reversal of 2257142816857 is 7586182417522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2066317125961 + 190825690896 = 1437469^2 + 436836^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257142816857 - 2³ = 2257142816849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2257142816837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128571408428 + 1128571408429.

It is an arithmetic number, because the mean of its divisors is an integer number (1128571408429).

Almost surely, 2^{2257142816857} is an apocalyptic number.

It is an amenable number.

2257142816857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257142816857 is an equidigital number, since it uses as much as digits as its factorization.

2257142816857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15052800, while the sum is 58.

The spelling of 2257142816857 in words is "two trillion, two hundred fifty-seven billion, one hundred forty-two million, eight hundred sixteen thousand, eight hundred fifty-seven".