15998861228073 has 4 divisors (see below), whose sum is σ = 21331814970768. Its totient is φ = 10665907485380.

The previous prime is 15998861228071. The next prime is 15998861228099. The reversal of 15998861228073 is 37082216889951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15998861228073 - 2¹ = 15998861228071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15998861227989 and 15998861228007.

It is not an unprimeable number, because it can be changed into a prime (15998861228071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666476871343 + ... + 2666476871348.

It is an arithmetic number, because the mean of its divisors is an integer number (5332953742692).

Almost surely, 2^{15998861228073} is an apocalyptic number.

It is an amenable number.

15998861228073 is a deficient number, since it is larger than the sum of its proper divisors (5332953742695).

15998861228073 is an equidigital number, since it uses as much as digits as its factorization.

15998861228073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332953742694.

The product of its (nonzero) digits is 104509440, while the sum is 69.

The spelling of 15998861228073 in words is "fifteen trillion, nine hundred ninety-eight billion, eight hundred sixty-one million, two hundred twenty-eight thousand, seventy-three".