39992864109 has 16 divisors (see below), whose sum is σ = 58615501824. Its totient is φ = 24053073200.

The previous prime is 39992864083. The next prime is 39992864111. The reversal of 39992864109 is 90146829993.

It is a cyclic number.

It is not a de Polignac number, because 39992864109 - 2²⁰ = 39991815533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39992864129) 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, 4621269 + ... + 4629914.

It is an arithmetic number, because the mean of its divisors is an integer number (3663468864).

Almost surely, 2^39992864109 is an apocalyptic number.

It is an amenable number.

39992864109 is a deficient number, since it is larger than the sum of its proper divisors (18622637715).

39992864109 is a wasteful number, since it uses less digits than its factorization.

39992864109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9251328.

The product of its (nonzero) digits is 7558272, while the sum is 60.

The spelling of 39992864109 in words is "thirty-nine billion, nine hundred ninety-two million, eight hundred sixty-four thousand, one hundred nine".