261008992 has 24 divisors (see below), whose sum is σ = 514533600. Its totient is φ = 130333824.

The previous prime is 261008981. The next prime is 261009031. The reversal of 261008992 is 299800162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21609 + ... + 31447.

It is an arithmetic number, because the mean of its divisors is an integer number (21438900).

Almost surely, 2^261008992 is an apocalyptic number.

It is an amenable number.

261008992 is a deficient number, since it is larger than the sum of its proper divisors (253524608).

261008992 is an equidigital number, since it uses as much as digits as its factorization.

261008992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10678 (or 10670 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 261008992 is about 16155.7727144201. The cubic root of 261008992 is about 639.0749918314.

The spelling of 261008992 in words is "two hundred sixty-one million, eight thousand, nine hundred ninety-two".