257474343474753 has 4 divisors (see below), whose sum is σ = 343299124633008. Its totient is φ = 171649562316500.

The previous prime is 257474343474749. The next prime is 257474343474757. The reversal of 257474343474753 is 357474343474752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (257474343474749) and next prime (257474343474757).

It is a cyclic number.

It is not a de Polignac number, because 257474343474753 - 2² = 257474343474749 is a prime.

It is a super-2 number, since 2×257474343474753² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257474343474757) 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, 42912390579123 + ... + 42912390579128.

It is an arithmetic number, because the mean of its divisors is an integer number (85824781158252).

Almost surely, 2^{257474343474753} is an apocalyptic number.

It is an amenable number.

257474343474753 is a deficient number, since it is larger than the sum of its proper divisors (85824781158255).

257474343474753 is an equidigital number, since it uses as much as digits as its factorization.

257474343474753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85824781158254.

The product of its digits is 3319142400, while the sum is 69.

Subtracting 257474343474753 from its reverse (357474343474752), we obtain a palindrome (99999999999999).

The spelling of 257474343474753 in words is "two hundred fifty-seven trillion, four hundred seventy-four billion, three hundred forty-three million, four hundred seventy-four thousand, seven hundred fifty-three".