261880893268 has 12 divisors (see below), whose sum is σ = 458417804992. Its totient is φ = 130904377560.

The previous prime is 261880893257. The next prime is 261880893289. The reversal of 261880893268 is 862398088162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9000930 + ... + 9029977.

Almost surely, 2^261880893268 is an apocalyptic number.

It is an amenable number.

261880893268 is a deficient number, since it is larger than the sum of its proper divisors (196536911724).

261880893268 is a wasteful number, since it uses less digits than its factorization.

261880893268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18034542 (or 18034540 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 61.

The spelling of 261880893268 in words is "two hundred sixty-one billion, eight hundred eighty million, eight hundred ninety-three thousand, two hundred sixty-eight".