3946691712651 has 8 divisors (see below), whose sum is σ = 5262458591040. Its totient is φ = 2631026321352.

The previous prime is 3946691712641. The next prime is 3946691712661. The reversal of 3946691712651 is 1562171966493.

It is a happy number.

3946691712651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3946691712641) and next prime (3946691712661).

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

It is not a de Polignac number, because 3946691712651 - 2¹⁵ = 3946691679883 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3946691712611) 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, 25280985 + ... + 25436618.

It is an arithmetic number, because the mean of its divisors is an integer number (657807323880).

Almost surely, 2^{3946691712651} is an apocalyptic number.

3946691712651 is a deficient number, since it is larger than the sum of its proper divisors (1315766878389).

3946691712651 is a wasteful number, since it uses less digits than its factorization.

3946691712651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50743545.

The product of its digits is 14696640, while the sum is 60.

The spelling of 3946691712651 in words is "three trillion, nine hundred forty-six billion, six hundred ninety-one million, seven hundred twelve thousand, six hundred fifty-one".