261033564 has 48 divisors (see below), whose sum is σ = 679916160. Its totient is φ = 77259840.

The previous prime is 261033517. The next prime is 261033587. The reversal of 261033564 is 465330162.

261033564 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17319 + ... + 28670.

It is an arithmetic number, because the mean of its divisors is an integer number (14164920).

Almost surely, 2^261033564 is an apocalyptic number.

It is an amenable number.

261033564 is an abundant number, since it is smaller than the sum of its proper divisors (418882596).

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

261033564 is a wasteful number, since it uses less digits than its factorization.

261033564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46050 (or 46048 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 261033564 is about 16156.5331677313. The cubic root of 261033564 is about 639.0950458761.

The spelling of 261033564 in words is "two hundred sixty-one million, thirty-three thousand, five hundred sixty-four".