261656423413612 has 12 divisors (see below), whose sum is σ = 457899106875336. Its totient is φ = 130828107163520.

The previous prime is 261656423413597. The next prime is 261656423413663. The reversal of 261656423413612 is 216314324656162.

It is a self number, because there is not a number n which added to its sum of digits gives 261656423413612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20362714 + ... + 30626017.

It is an arithmetic number, because the mean of its divisors is an integer number (38158258906278).

Almost surely, 2^{261656423413612} is an apocalyptic number.

It is an amenable number.

261656423413612 is a deficient number, since it is larger than the sum of its proper divisors (196242683461724).

261656423413612 is a wasteful number, since it uses less digits than its factorization.

261656423413612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52271648 (or 52271646 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 52.

The spelling of 261656423413612 in words is "two hundred sixty-one trillion, six hundred fifty-six billion, four hundred twenty-three million, four hundred thirteen thousand, six hundred twelve".