261116258 has 32 divisors (see below), whose sum is σ = 428736000. Its totient is φ = 118552896.

The previous prime is 261116239. The next prime is 261116269. The reversal of 261116258 is 852611162.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563735 + ... + 564197.

It is an arithmetic number, because the mean of its divisors is an integer number (13398000).

Almost surely, 2^261116258 is an apocalyptic number.

261116258 is a deficient number, since it is larger than the sum of its proper divisors (167619742).

261116258 is a wasteful number, since it uses less digits than its factorization.

261116258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its digits is 5760, while the sum is 32.

The square root of 261116258 is about 16159.0921155862. The cubic root of 261116258 is about 639.1625260181.

The spelling of 261116258 in words is "two hundred sixty-one million, one hundred sixteen thousand, two hundred fifty-eight".