15989491896 has 64 divisors (see below), whose sum is σ = 45708364800. Its totient is φ = 4566016128.

The previous prime is 15989491871. The next prime is 15989491913. The reversal of 15989491896 is 69819498951.

It is a self number, because there is not a number n which added to its sum of digits gives 15989491896.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307345 + ... + 355583.

It is an arithmetic number, because the mean of its divisors is an integer number (714193200).

Almost surely, 2^15989491896 is an apocalyptic number.

It is an amenable number.

15989491896 is an abundant number, since it is smaller than the sum of its proper divisors (29718872904).

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

15989491896 is a wasteful number, since it uses less digits than its factorization.

15989491896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50228 (or 50224 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 69.

The spelling of 15989491896 in words is "fifteen billion, nine hundred eighty-nine million, four hundred ninety-one thousand, eight hundred ninety-six".