261109196 has 12 divisors (see below), whose sum is σ = 457193352. Its totient is φ = 130482528.

The previous prime is 261109193. The next prime is 261109207. The reversal of 261109196 is 691901162.

261109196 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 (261109193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9410 + ... + 24713.

It is an arithmetic number, because the mean of its divisors is an integer number (38099446).

Almost surely, 2^261109196 is an apocalyptic number.

It is an amenable number.

261109196 is a deficient number, since it is larger than the sum of its proper divisors (196084156).

261109196 is a wasteful number, since it uses less digits than its factorization.

261109196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36040 (or 36038 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 261109196 is about 16158.8735993571. The cubic root of 261109196 is about 639.1567638256.

The spelling of 261109196 in words is "two hundred sixty-one million, one hundred nine thousand, one hundred ninety-six".