257245256701 has 4 divisors (see below), whose sum is σ = 257627494012. Its totient is φ = 256863019392.

The previous prime is 257245256699. The next prime is 257245256711. The reversal of 257245256701 is 107652542752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36490932676 + 220754324025 = 191026^2 + 469845^2 .

It is a cyclic number.

It is not a de Polignac number, because 257245256701 - 2¹ = 257245256699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257245256711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191117646 + ... + 191118991.

It is an arithmetic number, because the mean of its divisors is an integer number (64406873503).

Almost surely, 2^257245256701 is an apocalyptic number.

It is an amenable number.

257245256701 is a deficient number, since it is larger than the sum of its proper divisors (382237311).

257245256701 is an equidigital number, since it uses as much as digits as its factorization.

257245256701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382237310.

The product of its (nonzero) digits is 1176000, while the sum is 46.

The spelling of 257245256701 in words is "two hundred fifty-seven billion, two hundred forty-five million, two hundred fifty-six thousand, seven hundred one".