261646065174612 has 12 divisors (see below), whose sum is σ = 610507485407456. Its totient is φ = 87215355058200.

The previous prime is 261646065174511. The next prime is 261646065174649. The reversal of 261646065174612 is 216471560646162.

It is a tau number, because it is divible by the number of its divisors (12).

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, 10901919382264 + ... + 10901919382287.

Almost surely, 2^{261646065174612} is an apocalyptic number.

It is an amenable number.

261646065174612 is an abundant number, since it is smaller than the sum of its proper divisors (348861420232844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261646065174612 is a wasteful number, since it uses less digits than its factorization.

261646065174612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21803838764558 (or 21803838764556 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 261646065174612 in words is "two hundred sixty-one trillion, six hundred forty-six billion, sixty-five million, one hundred seventy-four thousand, six hundred twelve".