261448158 has 32 divisors (see below), whose sum is σ = 529361280. Its totient is φ = 86078880.

The previous prime is 261448133. The next prime is 261448177. The reversal of 261448158 is 851844162.

261448158 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 188628 + ... + 190008.

It is an arithmetic number, because the mean of its divisors is an integer number (16542540).

Almost surely, 2^261448158 is an apocalyptic number.

261448158 is an abundant number, since it is smaller than the sum of its proper divisors (267913122).

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

261448158 is a wasteful number, since it uses less digits than its factorization.

261448158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752.

The product of its digits is 61440, while the sum is 39.

The square root of 261448158 is about 16169.3586143669. The cubic root of 261448158 is about 639.4332205430.

The spelling of 261448158 in words is "two hundred sixty-one million, four hundred forty-eight thousand, one hundred fifty-eight".