257507758253 has 4 divisors (see below), whose sum is σ = 257590269468. Its totient is φ = 257425247040.

The previous prime is 257507758237. The next prime is 257507758267. The reversal of 257507758253 is 352857705752.

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 106371865609 + 151135892644 = 326147^2 + 388762^2 .

It is a cyclic number.

It is not a de Polignac number, because 257507758253 - 2⁴ = 257507758237 is a prime.

It is a super-2 number, since 2×257507758253² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257507758223) 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, 41250926 + ... + 41257167.

It is an arithmetic number, because the mean of its divisors is an integer number (64397567367).

Almost surely, 2^257507758253 is an apocalyptic number.

It is an amenable number.

257507758253 is a deficient number, since it is larger than the sum of its proper divisors (82511215).

257507758253 is an equidigital number, since it uses as much as digits as its factorization.

257507758253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82511214.

The product of its (nonzero) digits is 20580000, while the sum is 56.

The spelling of 257507758253 in words is "two hundred fifty-seven billion, five hundred seven million, seven hundred fifty-eight thousand, two hundred fifty-three".