2553615565 has 16 divisors (see below), whose sum is σ = 3102704640. Its totient is φ = 2017471680.

The previous prime is 2553615563. The next prime is 2553615613. The reversal of 2553615565 is 5655163552.

It is not a de Polignac number, because 2553615565 - 2¹ = 2553615563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553615563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123127 + ... + 142363.

It is an arithmetic number, because the mean of its divisors is an integer number (193919040).

Almost surely, 2^2553615565 is an apocalyptic number.

It is an amenable number.

2553615565 is a deficient number, since it is larger than the sum of its proper divisors (549089075).

2553615565 is a wasteful number, since it uses less digits than its factorization.

2553615565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19572.

The product of its digits is 675000, while the sum is 43.

The square root of 2553615565 is about 50533.3114390894. The cubic root of 2553615565 is about 1366.8425991701.

The spelling of 2553615565 in words is "two billion, five hundred fifty-three million, six hundred fifteen thousand, five hundred sixty-five".