15643980488 has 16 divisors (see below), whose sum is σ = 29334664860. Its totient is φ = 7821403200.

The previous prime is 15643980427. The next prime is 15643980497. The reversal of 15643980488 is 88408934651.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15401306404 + 242674084 = 124102^2 + 15578^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52598 + ... + 184538.

Almost surely, 2^15643980488 is an apocalyptic number.

It is an amenable number.

15643980488 is a deficient number, since it is larger than the sum of its proper divisors (13690684372).

15643980488 is a wasteful number, since it uses less digits than its factorization.

15643980488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146768 (or 146764 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 56.

The spelling of 15643980488 in words is "fifteen billion, six hundred forty-three million, nine hundred eighty thousand, four hundred eighty-eight".