261635468 has 12 divisors (see below), whose sum is σ = 458007312. Its totient is φ = 130776240.

The previous prime is 261635461. The next prime is 261635471. The reversal of 261635468 is 864536162.

It is not an unprimeable number, because it can be changed into a prime (261635461) 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, 7073 + ... + 23943.

It is an arithmetic number, because the mean of its divisors is an integer number (38167276).

Almost surely, 2^261635468 is an apocalyptic number.

It is an amenable number.

261635468 is a deficient number, since it is larger than the sum of its proper divisors (196371844).

261635468 is a wasteful number, since it uses less digits than its factorization.

261635468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20752 (or 20750 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 261635468 is about 16175.1497056441. The cubic root of 261635468 is about 639.5858877052.

The spelling of 261635468 in words is "two hundred sixty-one million, six hundred thirty-five thousand, four hundred sixty-eight".