261607206 has 16 divisors (see below), whose sum is σ = 597959424. Its totient is φ = 74744904.

The previous prime is 261607193. The next prime is 261607207. The reversal of 261607206 is 602706162.

It is a super-2 number, since 2×261607206² = 136876660462252872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261607207) 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, 3114330 + ... + 3114413.

It is an arithmetic number, because the mean of its divisors is an integer number (37372464).

Almost surely, 2^261607206 is an apocalyptic number.

261607206 is an abundant number, since it is smaller than the sum of its proper divisors (336352218).

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

261607206 is a wasteful number, since it uses less digits than its factorization.

261607206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228755.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 261607206 is about 16174.2760579879. The cubic root of 261607206 is about 639.5628574086.

The spelling of 261607206 in words is "two hundred sixty-one million, six hundred seven thousand, two hundred six".