261068688 has 60 divisors (see below), whose sum is σ = 735942480. Its totient is φ = 86390208.

The previous prime is 261068681. The next prime is 261068723. The reversal of 261068688 is 886860162.

It is a super-3 number, since 3×261068688³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (261068681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13495 + ... + 26537.

It is an arithmetic number, because the mean of its divisors is an integer number (12265708).

Almost surely, 2^261068688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261068688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367971240).

261068688 is an abundant number, since it is smaller than the sum of its proper divisors (474873792).

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

261068688 is a wasteful number, since it uses less digits than its factorization.

261068688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13196 (or 13187 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 261068688 is about 16157.6201217877. The cubic root of 261068688 is about 639.1237095816.

The spelling of 261068688 in words is "two hundred sixty-one million, sixty-eight thousand, six hundred eighty-eight".