261112992 has 96 divisors (see below), whose sum is σ = 786344832. Its totient is φ = 74317824.

The previous prime is 261112987. The next prime is 261113011. The reversal of 261112992 is 299211162.

It is a tau number, because it is divible by the number of its divisors (96).

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, 225888 + ... + 227040.

It is an arithmetic number, because the mean of its divisors is an integer number (8191092).

Almost surely, 2^261112992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261112992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393172416).

261112992 is an abundant number, since it is smaller than the sum of its proper divisors (525231840).

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

261112992 is a wasteful number, since it uses less digits than its factorization.

261112992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 1502 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 261112992 is about 16158.9910576125. The cubic root of 261112992 is about 639.1598611598.

The spelling of 261112992 in words is "two hundred sixty-one million, one hundred twelve thousand, nine hundred ninety-two".