2500253909281 has 4 divisors (see below), whose sum is σ = 2509982523972. Its totient is φ = 2490525294592.

The previous prime is 2500253909213. The next prime is 2500253909299. The reversal of 2500253909281 is 1829093520052.

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 2198458598400 + 301795310881 = 1482720^2 + 549359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2500253909281 is a prime.

It is a super-2 number, since 2×2500253909281² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2500253909201) 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, 4864306960 + ... + 4864307473.

It is an arithmetic number, because the mean of its divisors is an integer number (627495630993).

Almost surely, 2^{2500253909281} is an apocalyptic number.

It is an amenable number.

2500253909281 is a deficient number, since it is larger than the sum of its proper divisors (9728614691).

2500253909281 is an equidigital number, since it uses as much as digits as its factorization.

2500253909281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9728614690.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 2500253909281 in words is "two trillion, five hundred billion, two hundred fifty-three million, nine hundred nine thousand, two hundred eighty-one".