261158576 has 40 divisors (see below), whose sum is σ = 579367680. Its totient is φ = 111714624.

The previous prime is 261158567. The next prime is 261158581. The reversal of 261158576 is 675851162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67445 + ... + 71211.

It is an arithmetic number, because the mean of its divisors is an integer number (14484192).

Almost surely, 2^261158576 is an apocalyptic number.

It is an amenable number.

261158576 is an abundant number, since it is smaller than the sum of its proper divisors (318209104).

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

261158576 is a wasteful number, since it uses less digits than its factorization.

261158576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401 (or 4395 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 261158576 is about 16160.4014801613. The cubic root of 261158576 is about 639.1970529359.

The spelling of 261158576 in words is "two hundred sixty-one million, one hundred fifty-eight thousand, five hundred seventy-six".