261194870 has 16 divisors (see below), whose sum is σ = 470342160. Its totient is φ = 104435424.

The previous prime is 261194861. The next prime is 261194873. The reversal of 261194870 is 78491162.

261194870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×261194870² = 136445520228633800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261194873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35141 + ... + 41919.

It is an arithmetic number, because the mean of its divisors is an integer number (29396385).

Almost surely, 2^261194870 is an apocalyptic number.

261194870 is a deficient number, since it is larger than the sum of its proper divisors (209147290).

261194870 is a wasteful number, since it uses less digits than its factorization.

261194870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10639.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 261194870 is about 16161.5243711724. The cubic root of 261194870 is about 639.2266619492.

The spelling of 261194870 in words is "two hundred sixty-one million, one hundred ninety-four thousand, eight hundred seventy".