15998597448 has 16 divisors (see below), whose sum is σ = 39996493680. Its totient is φ = 5332865808.

The previous prime is 15998597441. The next prime is 15998597509. The reversal of 15998597448 is 84479589951.

It is a super-2 number, since 2×15998597448² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15998597441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333304090 + ... + 333304137.

It is an arithmetic number, because the mean of its divisors is an integer number (2499780855).

Almost surely, 2^15998597448 is an apocalyptic number.

It is an amenable number.

15998597448 is an abundant number, since it is smaller than the sum of its proper divisors (23997896232).

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

15998597448 is a wasteful number, since it uses less digits than its factorization.

15998597448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666608236 (or 666608232 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 69.

The spelling of 15998597448 in words is "fifteen billion, nine hundred ninety-eight million, five hundred ninety-seven thousand, four hundred forty-eight".