15649315808 has 36 divisors (see below), whose sum is σ = 35839731312. Its totient is φ = 6706848960.

The previous prime is 15649315783. The next prime is 15649315823. The reversal of 15649315808 is 80851394651.

15649315808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4988648 + ... + 4991783.

It is an arithmetic number, because the mean of its divisors is an integer number (995548092).

Almost surely, 2^15649315808 is an apocalyptic number.

It is an amenable number.

15649315808 is an abundant number, since it is smaller than the sum of its proper divisors (20190415504).

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

15649315808 is an equidigital number, since it uses as much as digits as its factorization.

15649315808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9980455 (or 9980440 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 15649315808 in words is "fifteen billion, six hundred forty-nine million, three hundred fifteen thousand, eight hundred eight".