15871679646 has 32 divisors (see below), whose sum is σ = 33057358848. Its totient is φ = 5074581120.

The previous prime is 15871679641. The next prime is 15871679669. The reversal of 15871679646 is 64697617851.

15871679646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15871679646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15871679641) 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 15 ways as a sum of consecutive naturals, for example, 356556 + ... + 398591.

It is an arithmetic number, because the mean of its divisors is an integer number (1033042464).

Almost surely, 2^15871679646 is an apocalyptic number.

15871679646 is an abundant number, since it is smaller than the sum of its proper divisors (17185679202).

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

15871679646 is a wasteful number, since it uses less digits than its factorization.

15871679646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755296.

The product of its digits is 15240960, while the sum is 60.

The spelling of 15871679646 in words is "fifteen billion, eight hundred seventy-one million, six hundred seventy-nine thousand, six hundred forty-six".