261194196 has 12 divisors (see below), whose sum is σ = 609453152. Its totient is φ = 87064728.

The previous prime is 261194191. The next prime is 261194201. The reversal of 261194196 is 691491162.

It is an interprime number because it is at equal distance from previous prime (261194191) and next prime (261194201).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261194191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10883080 + ... + 10883103.

Almost surely, 2^261194196 is an apocalyptic number.

It is an amenable number.

261194196 is an abundant number, since it is smaller than the sum of its proper divisors (348258956).

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

261194196 is a wasteful number, since it uses less digits than its factorization.

261194196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21766190 (or 21766188 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 261194196 is about 16161.5035191655. The cubic root of 261194196 is about 639.2261121181.

The spelling of 261194196 in words is "two hundred sixty-one million, one hundred ninety-four thousand, one hundred ninety-six".