39964244905983 has 16 divisors (see below), whose sum is σ = 54016249798400. Its totient is φ = 26277543751104.

The previous prime is 39964244905939. The next prime is 39964244905997. The reversal of 39964244905983 is 38950944246993.

It is a Cunningham number, because it is equal to 6321728²-1.

It is a de Polignac number, because none of the positive numbers 2^k-39964244905983 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 (39964244901983) 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, 17911560 + ... + 20018802.

It is an arithmetic number, because the mean of its divisors is an integer number (3376015612400).

Almost surely, 2^{39964244905983} is an apocalyptic number.

39964244905983 is a deficient number, since it is larger than the sum of its proper divisors (14052004892417).

39964244905983 is a wasteful number, since it uses less digits than its factorization.

39964244905983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193918.

The product of its (nonzero) digits is 1813985280, while the sum is 75.

The spelling of 39964244905983 in words is "thirty-nine trillion, nine hundred sixty-four billion, two hundred forty-four million, nine hundred five thousand, nine hundred eighty-three".