261444316 has 12 divisors (see below), whose sum is σ = 522888688. Its totient is φ = 112047552.

The previous prime is 261444247. The next prime is 261444319. The reversal of 261444316 is 613444162.

261444316 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261444319) 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, 4668621 + ... + 4668676.

Almost surely, 2^261444316 is an apocalyptic number.

It is an amenable number.

261444316 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261444316 is a wasteful number, since it uses less digits than its factorization.

261444316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9337308 (or 9337306 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 261444316 is about 16169.2398089706. The cubic root of 261444316 is about 639.4300883549.

Adding to 261444316 its reverse (613444162), we get a palindrome (874888478).

The spelling of 261444316 in words is "two hundred sixty-one million, four hundred forty-four thousand, three hundred sixteen".