3871681296781 has 16 divisors (see below), whose sum is σ = 4035828222720. Its totient is φ = 3711414481920.

The previous prime is 3871681296757. The next prime is 3871681296787. The reversal of 3871681296781 is 1876921861783.

It is a cyclic number.

It is not a de Polignac number, because 3871681296781 - 2⁷ = 3871681296653 is a prime.

It is a super-2 number, since 2×3871681296781² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871681296787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2949061 + ... + 4054666.

It is an arithmetic number, because the mean of its divisors is an integer number (252239263920).

Almost surely, 2^{3871681296781} is an apocalyptic number.

It is an amenable number.

3871681296781 is a deficient number, since it is larger than the sum of its proper divisors (164146925939).

3871681296781 is a wasteful number, since it uses less digits than its factorization.

3871681296781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004004.

The product of its digits is 48771072, while the sum is 67.

The spelling of 3871681296781 in words is "three trillion, eight hundred seventy-one billion, six hundred eighty-one million, two hundred ninety-six thousand, seven hundred eighty-one".