15493981808 has 40 divisors (see below), whose sum is σ = 30530635200. Its totient is φ = 7615954944.

The previous prime is 15493981793. The next prime is 15493981817. The reversal of 15493981808 is 80818939451.

15493981808 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 7 ways as a sum of consecutive naturals, for example, 268208 + ... + 320816.

It is an arithmetic number, because the mean of its divisors is an integer number (763265880).

Almost surely, 2^15493981808 is an apocalyptic number.

It is an amenable number.

15493981808 is a deficient number, since it is larger than the sum of its proper divisors (15036653392).

15493981808 is a wasteful number, since it uses less digits than its factorization.

15493981808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52929 (or 52923 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 56.

The spelling of 15493981808 in words is "fifteen billion, four hundred ninety-three million, nine hundred eighty-one thousand, eight hundred eight".