3261648741971 has 4 divisors (see below), whose sum is σ = 3263210088600. Its totient is φ = 3260087395344.

The previous prime is 3261648741811. The next prime is 3261648741979. The reversal of 3261648741971 is 1791478461623.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3261648741971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3261648741971.

It is not an unprimeable number, because it can be changed into a prime (3261648741979) 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 3 ways as a sum of consecutive naturals, for example, 780670181 + ... + 780674358.

It is an arithmetic number, because the mean of its divisors is an integer number (815802522150).

Almost surely, 2^{3261648741971} is an apocalyptic number.

3261648741971 is a deficient number, since it is larger than the sum of its proper divisors (1561346629).

3261648741971 is a wasteful number, since it uses less digits than its factorization.

3261648741971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561346628.

The product of its digits is 12192768, while the sum is 59.

The spelling of 3261648741971 in words is "three trillion, two hundred sixty-one billion, six hundred forty-eight million, seven hundred forty-one thousand, nine hundred seventy-one".