39808688861 has 32 divisors (see below), whose sum is σ = 42699571200. Its totient is φ = 37050773760.

The previous prime is 39808688837. The next prime is 39808688917. The reversal of 39808688861 is 16888680893.

It is a cyclic number.

It is not a de Polignac number, because 39808688861 - 2⁶ = 39808688797 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 (39808687861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21275756 + ... + 21277626.

It is an arithmetic number, because the mean of its divisors is an integer number (1334361600).

Almost surely, 2^39808688861 is an apocalyptic number.

It is an amenable number.

39808688861 is a deficient number, since it is larger than the sum of its proper divisors (2890882339).

39808688861 is a wasteful number, since it uses less digits than its factorization.

39808688861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189.

The product of its (nonzero) digits is 31850496, while the sum is 65.

The spelling of 39808688861 in words is "thirty-nine billion, eight hundred eight million, six hundred eighty-eight thousand, eight hundred sixty-one".