39606398646 has 32 divisors (see below), whose sum is σ = 79525974528. Its totient is φ = 13149986400.

The previous prime is 39606398641. The next prime is 39606398707. The reversal of 39606398646 is 64689360693.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 39606398646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39606398641) 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, 4015621 + ... + 4025471.

It is an arithmetic number, because the mean of its divisors is an integer number (2485186704).

Almost surely, 2^39606398646 is an apocalyptic number.

39606398646 is an abundant number, since it is smaller than the sum of its proper divisors (39919575882).

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

39606398646 is a wasteful number, since it uses less digits than its factorization.

39606398646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12436.

The product of its (nonzero) digits is 30233088, while the sum is 60.

The spelling of 39606398646 in words is "thirty-nine billion, six hundred six million, three hundred ninety-eight thousand, six hundred forty-six".