261341610 has 16 divisors (see below), whose sum is σ = 627219936. Its totient is φ = 69691088.

The previous prime is 261341581. The next prime is 261341627. The reversal of 261341610 is 16143162.

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, 4355664 + ... + 4355723.

It is an arithmetic number, because the mean of its divisors is an integer number (39201246).

Almost surely, 2^261341610 is an apocalyptic number.

261341610 is an abundant number, since it is smaller than the sum of its proper divisors (365878326).

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

261341610 is a wasteful number, since it uses less digits than its factorization.

261341610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8711397.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 261341610 is about 16166.0635282681. The cubic root of 261341610 is about 639.3463459743.

Adding to 261341610 its reverse (16143162), we get a palindrome (277484772).

The spelling of 261341610 in words is "two hundred sixty-one million, three hundred forty-one thousand, six hundred ten".