39694649694 has 32 divisors (see below), whose sum is σ = 90890138880. Its totient is φ = 11321389632.

The previous prime is 39694649669. The next prime is 39694649699. The reversal of 39694649694 is 49694649693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39694649699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 806604 + ... + 854399.

It is an arithmetic number, because the mean of its divisors is an integer number (2840316840).

Almost surely, 2^39694649694 is an apocalyptic number.

39694649694 is an abundant number, since it is smaller than the sum of its proper divisors (51195489186).

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

39694649694 is a wasteful number, since it uses less digits than its factorization.

39694649694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661584.

The product of its digits is 272097792, while the sum is 69.

Subtracting 39694649694 from its reverse (49694649693), we obtain a palindrome (9999999999).

The spelling of 39694649694 in words is "thirty-nine billion, six hundred ninety-four million, six hundred forty-nine thousand, six hundred ninety-four".