39643687496 has 16 divisors (see below), whose sum is σ = 84950759040. Its totient is φ = 16990151760.

The previous prime is 39643687493. The next prime is 39643687529. The reversal of 39643687496 is 69478634693.

It is not an unprimeable number, because it can be changed into a prime (39643687493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353961440 + ... + 353961551.

It is an arithmetic number, because the mean of its divisors is an integer number (5309422440).

Almost surely, 2^39643687496 is an apocalyptic number.

It is an amenable number.

39643687496 is an abundant number, since it is smaller than the sum of its proper divisors (45307071544).

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

39643687496 is a wasteful number, since it uses less digits than its factorization.

39643687496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707923004 (or 707923000 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 65.

The spelling of 39643687496 in words is "thirty-nine billion, six hundred forty-three million, six hundred eighty-seven thousand, four hundred ninety-six".