2561242453 has 24 divisors (see below), whose sum is σ = 3304426496. Its totient is φ = 1941809760.

The previous prime is 2561242421. The next prime is 2561242459. The reversal of 2561242453 is 3542421652.

2561242453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2561242453 - 2⁵ = 2561242421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561242459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9525 + ... + 72202.

Almost surely, 2^2561242453 is an apocalyptic number.

It is an amenable number.

2561242453 is a deficient number, since it is larger than the sum of its proper divisors (743184043).

2561242453 is a wasteful number, since it uses less digits than its factorization.

2561242453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81793 (or 81782 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

The square root of 2561242453 is about 50608.7191400849. The cubic root of 2561242453 is about 1368.2020303758.

The spelling of 2561242453 in words is "two billion, five hundred sixty-one million, two hundred forty-two thousand, four hundred fifty-three".