3261648709681 has 8 divisors (see below), whose sum is σ = 3325922293824. Its totient is φ = 3198002185200.

The previous prime is 3261648709667. The next prime is 3261648709721. The reversal of 3261648709681 is 1869078461623.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3261648709681 - 2²⁹ = 3261111838769 is a prime.

It is a super-2 number, since 2×3261648709681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3261648709601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156754411 + ... + 156775216.

It is an arithmetic number, because the mean of its divisors is an integer number (415740286728).

Almost surely, 2^{3261648709681} is an apocalyptic number.

It is an amenable number.

3261648709681 is a deficient number, since it is larger than the sum of its proper divisors (64273584143).

3261648709681 is a wasteful number, since it uses less digits than its factorization.

3261648709681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313529831.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 3261648709681 in words is "three trillion, two hundred sixty-one billion, six hundred forty-eight million, seven hundred nine thousand, six hundred eighty-one".