261064265744 has 20 divisors (see below), whose sum is σ = 505842463296. Its totient is φ = 130524275232.

The previous prime is 261064265731. The next prime is 261064265767. The reversal of 261064265744 is 447562460162.

It is a happy number.

261064265744 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212204 + ... + 753099.

Almost surely, 2^261064265744 is an apocalyptic number.

It is an amenable number.

261064265744 is a deficient number, since it is larger than the sum of its proper divisors (244778197552).

261064265744 is a wasteful number, since it uses less digits than its factorization.

261064265744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982214 (or 982208 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 47.

The spelling of 261064265744 in words is "two hundred sixty-one billion, sixty-four million, two hundred sixty-five thousand, seven hundred forty-four".