3991620784013 has 8 divisors (see below), whose sum is σ = 4236228097920. Its totient is φ = 3748103035840.

The previous prime is 3991620784003. The next prime is 3991620784027. The reversal of 3991620784013 is 3104870261993.

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 3991620784013 - 2⁸ = 3991620783757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991620784003) 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 7 ways as a sum of consecutive naturals, for example, 272383883 + ... + 272398536.

It is an arithmetic number, because the mean of its divisors is an integer number (529528512240).

Almost surely, 2^{3991620784013} is an apocalyptic number.

It is an amenable number.

3991620784013 is a deficient number, since it is larger than the sum of its proper divisors (244607313907).

3991620784013 is a wasteful number, since it uses less digits than its factorization.

3991620784013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544782867.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 3991620784013 in words is "three trillion, nine hundred ninety-one billion, six hundred twenty million, seven hundred eighty-four thousand, thirteen".