261696268 has 12 divisors (see below), whose sum is σ = 458912272. Its totient is φ = 130578480.

The previous prime is 261696263. The next prime is 261696271. The reversal of 261696268 is 862696162.

261696268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261696263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65223 + ... + 69118.

Almost surely, 2^261696268 is an apocalyptic number.

It is an amenable number.

261696268 is a deficient number, since it is larger than the sum of its proper divisors (197216004).

261696268 is a wasteful number, since it uses less digits than its factorization.

261696268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134832 (or 134830 counting only the distinct ones).

The product of its digits is 373248, while the sum is 46.

The square root of 261696268 is about 16177.0290226605. The cubic root of 261696268 is about 639.6354271279.

The spelling of 261696268 in words is "two hundred sixty-one million, six hundred ninety-six thousand, two hundred sixty-eight".