261598316 has 24 divisors (see below), whose sum is σ = 523926816. Its totient is φ = 111957120.

The previous prime is 261598313. The next prime is 261598331. The reversal of 261598316 is 613895162.

It is not an unprimeable number, because it can be changed into a prime (261598313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15170 + ... + 27446.

It is an arithmetic number, because the mean of its divisors is an integer number (21830284).

Almost surely, 2^261598316 is an apocalyptic number.

It is an amenable number.

261598316 is an abundant number, since it is smaller than the sum of its proper divisors (262328500).

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

261598316 is a wasteful number, since it uses less digits than its factorization.

261598316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13049 (or 13047 counting only the distinct ones).

The product of its digits is 77760, while the sum is 41.

The square root of 261598316 is about 16174.0012365524. The cubic root of 261598316 is about 639.5556127328. Note that the first 3 decimals are identical.

The spelling of 261598316 in words is "two hundred sixty-one million, five hundred ninety-eight thousand, three hundred sixteen".