39964646993 has 8 divisors (see below), whose sum is σ = 40481023968. Its totient is φ = 39449100544.

The previous prime is 39964646947. The next prime is 39964646999.

39964646993 is nontrivially palindromic in base 10.

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

It is a de Polignac number, because none of the positive numbers 2^k-39964646993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39964646999) 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, 110480 + ... + 303537.

It is an arithmetic number, because the mean of its divisors is an integer number (5060127996).

Almost surely, 2^39964646993 is an apocalyptic number.

It is an amenable number.

39964646993 is a deficient number, since it is larger than the sum of its proper divisors (516376975).

39964646993 is a wasteful number, since it uses less digits than its factorization.

39964646993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415263.

The product of its digits is 204073344, while the sum is 68.

The spelling of 39964646993 in words is "thirty-nine billion, nine hundred sixty-four million, six hundred forty-six thousand, nine hundred ninety-three".