39994049994 has 32 divisors (see below), whose sum is σ = 81952141824. Its totient is φ = 13004113920.

The previous prime is 39994049989. The next prime is 39994049999. The reversal of 39994049994 is 49994049993.

It is an interprime number because it is at equal distance from previous prime (39994049989) and next prime (39994049999).

It is not an unprimeable number, because it can be changed into a prime (39994049999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2558727 + ... + 2574309.

It is an arithmetic number, because the mean of its divisors is an integer number (2561004432).

Almost surely, 2^39994049994 is an apocalyptic number.

39994049994 is an abundant number, since it is smaller than the sum of its proper divisors (41958091830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39994049994 is a wasteful number, since it uses less digits than its factorization.

39994049994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26062.

The product of its (nonzero) digits is 102036672, while the sum is 69.

Subtracting 39994049994 from its reverse (49994049993), we obtain a palindrome (9999999999).

The spelling of 39994049994 in words is "thirty-nine billion, nine hundred ninety-four million, forty-nine thousand, nine hundred ninety-four".