3261645164871 has 16 divisors (see below), whose sum is σ = 4832198028000. Its totient is φ = 2174371107264.

The previous prime is 3261645164801. The next prime is 3261645164881. The reversal of 3261645164871 is 1784615461623.

3261645164871 is a `hidden beast` number, since 3 + 2 + 6 + 16 + 4 + 516 + 48 + 71 = 666.

It is not a de Polignac number, because 3261645164871 - 2¹¹ = 3261645162823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261645164801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 613846 + ... + 2626803.

It is an arithmetic number, because the mean of its divisors is an integer number (302012376750).

Almost surely, 2^{3261645164871} is an apocalyptic number.

3261645164871 is a deficient number, since it is larger than the sum of its proper divisors (1570552863129).

3261645164871 is a wasteful number, since it uses less digits than its factorization.

3261645164871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277935 (or 3277929 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 3261645164871 in words is "three trillion, two hundred sixty-one billion, six hundred forty-five million, one hundred sixty-four thousand, eight hundred seventy-one".