39986697216 has 88 divisors (see below), whose sum is σ = 106684792704. Its totient is φ = 13315686400.

The previous prime is 39986697187. The next prime is 39986697221. The reversal of 39986697216 is 61279668993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3382516 + ... + 3394316.

Almost surely, 2^39986697216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39986697216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53342396352).

39986697216 is an abundant number, since it is smaller than the sum of its proper divisors (66698095488).

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

39986697216 is a wasteful number, since it uses less digits than its factorization.

39986697216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12927 (or 12909 counting only the distinct ones).

The product of its digits is 52907904, while the sum is 66.

The spelling of 39986697216 in words is "thirty-nine billion, nine hundred eighty-six million, six hundred ninety-seven thousand, two hundred sixteen".