261080500288 has 56 divisors (see below), whose sum is σ = 536291942400. Its totient is φ = 125957626368.

The previous prime is 261080500283. The next prime is 261080500301. The reversal of 261080500288 is 882005080162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 261080500288.

It is not an unprimeable number, because it can be changed into a prime (261080500283) 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, 2886081 + ... + 2975167.

Almost surely, 2^261080500288 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 261080500288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268145971200).

261080500288 is an abundant number, since it is smaller than the sum of its proper divisors (275211442112).

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

261080500288 is a wasteful number, since it uses less digits than its factorization.

261080500288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90707 (or 90697 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 261080500288 in words is "two hundred sixty-one billion, eighty million, five hundred thousand, two hundred eighty-eight".