257050315761643 has 4 divisors (see below), whose sum is σ = 257927620593888. Its totient is φ = 256173010929400.

The previous prime is 257050315761637. The next prime is 257050315761719. The reversal of 257050315761643 is 346167513050752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257050315761643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257050315561643) 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, 438652415683 + ... + 438652416268.

It is an arithmetic number, because the mean of its divisors is an integer number (64481905148472).

Almost surely, 2^{257050315761643} is an apocalyptic number.

257050315761643 is a deficient number, since it is larger than the sum of its proper divisors (877304832245).

257050315761643 is an equidigital number, since it uses as much as digits as its factorization.

257050315761643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877304832244.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 257050315761643 in words is "two hundred fifty-seven trillion, fifty billion, three hundred fifteen million, seven hundred sixty-one thousand, six hundred forty-three".