261959104 has 56 divisors (see below), whose sum is σ = 569872368. Its totient is φ = 118487040.

The previous prime is 261959077. The next prime is 261959107. The reversal of 261959104 is 401959162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261959107) 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, 163234 + ... + 164830.

Almost surely, 2^261959104 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 261959104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284936184).

261959104 is an abundant number, since it is smaller than the sum of its proper divisors (307913264).

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

261959104 is a wasteful number, since it uses less digits than its factorization.

261959104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853 (or 1843 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 261959104 is about 16185.1507252790. The cubic root of 261959104 is about 639.8494958598.

The spelling of 261959104 in words is "two hundred sixty-one million, nine hundred fifty-nine thousand, one hundred four".