261055844 has 24 divisors (see below), whose sum is σ = 530674368. Its totient is φ = 110046240.

The previous prime is 261055843. The next prime is 261055849. The reversal of 261055844 is 448550162.

It is not an unprimeable number, because it can be changed into a prime (261055841) 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, 74714 + ... + 78129.

It is an arithmetic number, because the mean of its divisors is an integer number (22111432).

Almost surely, 2^261055844 is an apocalyptic number.

It is an amenable number.

261055844 is an abundant number, since it is smaller than the sum of its proper divisors (269618524).

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

261055844 is a wasteful number, since it uses less digits than its factorization.

261055844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152915 (or 152913 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 261055844 is about 16157.2226573752. Note that the first 3 decimals coincide. The cubic root of 261055844 is about 639.1132282537.

The spelling of 261055844 in words is "two hundred sixty-one million, fifty-five thousand, eight hundred forty-four".