261044264 has 16 divisors (see below), whose sum is σ = 527108820. Its totient is φ = 120481920.

The previous prime is 261044257. The next prime is 261044269. The reversal of 261044264 is 462440162.

It is a happy number.

261044264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 235622500 + 25421764 = 15350^2 + 5042^2 .

It is not an unprimeable number, because it can be changed into a prime (261044269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254917 + ... + 1255124.

Almost surely, 2^261044264 is an apocalyptic number.

It is an amenable number.

261044264 is an abundant number, since it is smaller than the sum of its proper divisors (266064556).

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

261044264 is a wasteful number, since it uses less digits than its factorization.

261044264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510060 (or 2510056 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 261044264 is about 16156.8642997334. The cubic root of 261044264 is about 639.1037781166.

The spelling of 261044264 in words is "two hundred sixty-one million, forty-four thousand, two hundred sixty-four".