257145870683 has 4 divisors (see below), whose sum is σ = 276926322288. Its totient is φ = 237365419080.

The previous prime is 257145870677. The next prime is 257145870691. The reversal of 257145870683 is 386078541752.

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 257145870683 - 2¹⁴ = 257145854299 is a prime.

It is a super-2 number, since 2×257145870683² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257145870283) 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, 9890225783 + ... + 9890225808.

It is an arithmetic number, because the mean of its divisors is an integer number (69231580572).

Almost surely, 2^257145870683 is an apocalyptic number.

257145870683 is a deficient number, since it is larger than the sum of its proper divisors (19780451605).

257145870683 is a wasteful number, since it uses less digits than its factorization.

257145870683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19780451604.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 257145870683 in words is "two hundred fifty-seven billion, one hundred forty-five million, eight hundred seventy thousand, six hundred eighty-three".