261194706 has 80 divisors (see below), whose sum is σ = 617463000. Its totient is φ = 82397952.

The previous prime is 261194701. The next prime is 261194707. The reversal of 261194706 is 607491162.

261194706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 260984025 + 210681 = 16155^2 + 459^2 .

It is not an unprimeable number, because it can be changed into a prime (261194701) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 248470 + ... + 249518.

Almost surely, 2^261194706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261194706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308731500).

261194706 is an abundant number, since it is smaller than the sum of its proper divisors (356268294).

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

261194706 is a wasteful number, since it uses less digits than its factorization.

261194706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 261194706 is about 16161.5192973928. The cubic root of 261194706 is about 639.2265281625.

The spelling of 261194706 in words is "two hundred sixty-one million, one hundred ninety-four thousand, seven hundred six".