261679112 has 8 divisors (see below), whose sum is σ = 490648350. Its totient is φ = 130839552.

The previous prime is 261679111. The next prime is 261679169. The reversal of 261679112 is 211976162.

It can be written as a sum of positive squares in only one way, i.e., 251349316 + 10329796 = 15854^2 + 3214^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (261679111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16354937 + ... + 16354952.

Almost surely, 2^261679112 is an apocalyptic number.

It is an amenable number.

261679112 is a deficient number, since it is larger than the sum of its proper divisors (228969238).

261679112 is a wasteful number, since it uses less digits than its factorization.

261679112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32709895 (or 32709891 counting only the distinct ones).

The product of its digits is 9072, while the sum is 35.

The square root of 261679112 is about 16176.4987559113. The cubic root of 261679112 is about 639.6214493140.

The spelling of 261679112 in words is "two hundred sixty-one million, six hundred seventy-nine thousand, one hundred twelve".