39855707712 has 84 divisors (see below), whose sum is σ = 117025581036. Its totient is φ = 12961198080.

The previous prime is 39855707701. The next prime is 39855707719. The reversal of 39855707712 is 21770755893.

It is a happy number.

39855707712 is a `hidden beast` number, since 3 + 9 + 8 + 557 + 0 + 77 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23822070336 + 16033637376 = 154344^2 + 126624^2 .

It is not an unprimeable number, because it can be changed into a prime (39855707719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 820213 + ... + 867444.

It is an arithmetic number, because the mean of its divisors is an integer number (1393161679).

Almost surely, 2^39855707712 is an apocalyptic number.

39855707712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

39855707712 is an abundant number, since it is smaller than the sum of its proper divisors (77169873324).

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

39855707712 is a wasteful number, since it uses less digits than its factorization.

39855707712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687716 (or 1687703 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 54.

The spelling of 39855707712 in words is "thirty-nine billion, eight hundred fifty-five million, seven hundred seven thousand, seven hundred twelve".