257674702947 has 4 divisors (see below), whose sum is σ = 343566270600. Its totient is φ = 171783135296.

The previous prime is 257674702933. The next prime is 257674702991. The reversal of 257674702947 is 749207476752.

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 257674702947 - 2⁷ = 257674702819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257674702547) 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, 42945783822 + ... + 42945783827.

It is an arithmetic number, because the mean of its divisors is an integer number (85891567650).

Almost surely, 2^257674702947 is an apocalyptic number.

257674702947 is a deficient number, since it is larger than the sum of its proper divisors (85891567653).

257674702947 is an equidigital number, since it uses as much as digits as its factorization.

257674702947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85891567652.

The product of its (nonzero) digits is 41489280, while the sum is 60.

The spelling of 257674702947 in words is "two hundred fifty-seven billion, six hundred seventy-four million, seven hundred two thousand, nine hundred forty-seven".