256516024317253 has 4 divisors (see below), whose sum is σ = 256516096927500. Its totient is φ = 256515951707008.

The previous prime is 256516024317191. The next prime is 256516024317281. The reversal of 256516024317253 is 352713420615652.

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 28070997414849 + 228445026902404 = 5298207^2 + 15114398^2 .

It is a cyclic number.

It is not a de Polignac number, because 256516024317253 - 2⁴¹ = 254317001061701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256516024317253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256516024317853) 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, 30719500 + ... + 38166997.

It is an arithmetic number, because the mean of its divisors is an integer number (64129024231875).

Almost surely, 2^{256516024317253} is an apocalyptic number.

It is an amenable number.

256516024317253 is a deficient number, since it is larger than the sum of its proper divisors (72610247).

256516024317253 is an equidigital number, since it uses as much as digits as its factorization.

256516024317253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72610246.

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 256516024317253 in words is "two hundred fifty-six trillion, five hundred sixteen billion, twenty-four million, three hundred seventeen thousand, two hundred fifty-three".