261361364 has 24 divisors (see below), whose sum is σ = 501160800. Its totient is φ = 118277280.

The previous prime is 261361363. The next prime is 261361379. The reversal of 261361364 is 463163162.

261361364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 261361364.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261361363) 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, 2894 + ... + 23045.

It is an arithmetic number, because the mean of its divisors is an integer number (20881700).

Almost surely, 2^261361364 is an apocalyptic number.

It is an amenable number.

261361364 is a deficient number, since it is larger than the sum of its proper divisors (239799436).

261361364 is a wasteful number, since it uses less digits than its factorization.

261361364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26183 (or 26181 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 261361364 is about 16166.6744879706. The cubic root of 261361364 is about 639.3624543028.

The spelling of 261361364 in words is "two hundred sixty-one million, three hundred sixty-one thousand, three hundred sixty-four".