3909712967781 has 16 divisors (see below), whose sum is σ = 5239142469120. Its totient is φ = 2593391958720.

The previous prime is 3909712967777. The next prime is 3909712967789. The reversal of 3909712967781 is 1877692179093.

3909712967781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3909712967781 - 2² = 3909712967777 is a prime.

It is a super-2 number, since 2×3909712967781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909712967789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325146 + ... + 2815163.

It is an arithmetic number, because the mean of its divisors is an integer number (327446404320).

Almost surely, 2^{3909712967781} is an apocalyptic number.

It is an amenable number.

3909712967781 is a deficient number, since it is larger than the sum of its proper divisors (1329429501339).

3909712967781 is a wasteful number, since it uses less digits than its factorization.

3909712967781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142396.

The product of its (nonzero) digits is 72013536, while the sum is 69.

The spelling of 3909712967781 in words is "three trillion, nine hundred nine billion, seven hundred twelve million, nine hundred sixty-seven thousand, seven hundred eighty-one".