39872772405 has 12 divisors (see below), whose sum is σ = 69112805580. Its totient is φ = 21265478592.

The previous prime is 39872772361. The next prime is 39872772413. The reversal of 39872772405 is 50427727893.

39872772405 is a `hidden beast` number, since 398 + 7 + 2 + 7 + 7 + 240 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16019205489 + 23853566916 = 126567^2 + 154446^2 .

It is not a de Polignac number, because 39872772405 - 2⁶ = 39872772341 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443030760 + ... + 443030849.

It is an arithmetic number, because the mean of its divisors is an integer number (5759400465).

Almost surely, 2^39872772405 is an apocalyptic number.

It is an amenable number.

39872772405 is a deficient number, since it is larger than the sum of its proper divisors (29240033175).

39872772405 is a wasteful number, since it uses less digits than its factorization.

39872772405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886061620 (or 886061617 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 39872772405 in words is "thirty-nine billion, eight hundred seventy-two million, seven hundred seventy-two thousand, four hundred five".