39956844865993 has 8 divisors (see below), whose sum is σ = 43597672764480. Its totient is φ = 36317414876880.

The previous prime is 39956844865943. The next prime is 39956844865997.

39956844865993 is nontrivially palindromic in base 10.

39956844865993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39956844865993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39956844865997) 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, 349417573 + ... + 349531906.

It is an arithmetic number, because the mean of its divisors is an integer number (5449709095560).

Almost surely, 2^{39956844865993} is an apocalyptic number.

It is an amenable number.

39956844865993 is a deficient number, since it is larger than the sum of its proper divisors (3640827898487).

39956844865993 is a wasteful number, since it uses less digits than its factorization.

39956844865993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698954687.

The product of its digits is 54419558400, while the sum is 88.

The spelling of 39956844865993 in words is "thirty-nine trillion, nine hundred fifty-six billion, eight hundred forty-four million, eight hundred sixty-five thousand, nine hundred ninety-three".