2561255154 has 40 divisors (see below), whose sum is σ = 5924252928. Its totient is φ = 826209720.

The previous prime is 2561255153. The next prime is 2561255159. The reversal of 2561255154 is 4515521652.

2561255154 is a `hidden beast` number, since 2 + 56 + 1 + 2 + 551 + 54 = 666.

2561255154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2561255153) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 249982 + ... + 260025.

Almost surely, 2^2561255154 is an apocalyptic number.

2561255154 is an abundant number, since it is smaller than the sum of its proper divisors (3362997774).

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

2561255154 is a wasteful number, since it uses less digits than its factorization.

2561255154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510052 (or 510043 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 2561255154 is about 50608.8446222595. The cubic root of 2561255154 is about 1368.2042919741.

The spelling of 2561255154 in words is "two billion, five hundred sixty-one million, two hundred fifty-five thousand, one hundred fifty-four".