2553115561 has 2 divisors, whose sum is σ = 2553115562. Its totient is φ = 2553115560.

The previous prime is 2553115553. The next prime is 2553115603. The reversal of 2553115561 is 1655113552.

2553115561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1508856336 + 1044259225 = 38844^2 + 32315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2553115561 - 2³ = 2553115553 is a prime.

It is not a weakly prime, because it can be changed into another prime (2553115501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1276557780 + 1276557781.

It is an arithmetic number, because the mean of its divisors is an integer number (1276557781).

Almost surely, 2^2553115561 is an apocalyptic number.

It is an amenable number.

2553115561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2553115561 is an equidigital number, since it uses as much as digits as its factorization.

2553115561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22500, while the sum is 34.

The square root of 2553115561 is about 50528.3639256210. The cubic root of 2553115561 is about 1366.7533830032.

The spelling of 2553115561 in words is "two billion, five hundred fifty-three million, one hundred fifteen thousand, five hundred sixty-one".