2561261154 has 16 divisors (see below), whose sum is σ = 5209345440. Its totient is φ = 839283200.

The previous prime is 2561261147. The next prime is 2561261167. The reversal of 2561261154 is 4511621652.

2561261154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3617247 + ... + 3617954.

It is an arithmetic number, because the mean of its divisors is an integer number (325584090).

Almost surely, 2^2561261154 is an apocalyptic number.

2561261154 is an abundant number, since it is smaller than the sum of its proper divisors (2648084286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561261154 is a wasteful number, since it uses less digits than its factorization.

2561261154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7235265.

The product of its digits is 14400, while the sum is 33.

The square root of 2561261154 is about 50608.9039004008. The cubic root of 2561261154 is about 1368.2053603591.

The spelling of 2561261154 in words is "two billion, five hundred sixty-one million, two hundred sixty-one thousand, one hundred fifty-four".