261711160 has 16 divisors (see below), whose sum is σ = 588850200. Its totient is φ = 104684448.

The previous prime is 261711157. The next prime is 261711173. The reversal of 261711160 is 61117162.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3271350 + ... + 3271429.

Almost surely, 2^261711160 is an apocalyptic number.

261711160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261711160 is an abundant number, since it is smaller than the sum of its proper divisors (327139040).

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

261711160 is a wasteful number, since it uses less digits than its factorization.

261711160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542790 (or 6542786 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 261711160 is about 16177.4892984047. The cubic root of 261711160 is about 639.6475598574.

The spelling of 261711160 in words is "two hundred sixty-one million, seven hundred eleven thousand, one hundred sixty".