2552811561 has 12 divisors (see below), whose sum is σ = 3847716288. Its totient is φ = 1627879704.

The previous prime is 2552811517. The next prime is 2552811581. The reversal of 2552811561 is 1651182552.

It is not a de Polignac number, because 2552811561 - 2⁶ = 2552811497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2552811581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6166005 + ... + 6166418.

It is an arithmetic number, because the mean of its divisors is an integer number (320643024).

Almost surely, 2^2552811561 is an apocalyptic number.

It is an amenable number.

2552811561 is a deficient number, since it is larger than the sum of its proper divisors (1294904727).

2552811561 is a wasteful number, since it uses less digits than its factorization.

2552811561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12332452 (or 12332449 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 2552811561 is about 50525.3556246762. The cubic root of 2552811561 is about 1366.6991343136.

The spelling of 2552811561 in words is "two billion, five hundred fifty-two million, eight hundred eleven thousand, five hundred sixty-one".