2561188162 has 16 divisors (see below), whose sum is σ = 4140263232. Its totient is φ = 1181241360.

The previous prime is 2561188141. The next prime is 2561188213. The reversal of 2561188162 is 2618811652.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2587 + ... + 71617.

It is an arithmetic number, because the mean of its divisors is an integer number (258766452).

Almost surely, 2^2561188162 is an apocalyptic number.

2561188162 is a deficient number, since it is larger than the sum of its proper divisors (1579075070).

2561188162 is a wasteful number, since it uses less digits than its factorization.

2561188162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70473.

The product of its digits is 46080, while the sum is 40.

The square root of 2561188162 is about 50608.1827573368. The cubic root of 2561188162 is about 1368.1923629868.

The spelling of 2561188162 in words is "two billion, five hundred sixty-one million, one hundred eighty-eight thousand, one hundred sixty-two".