15994126907089 has 4 divisors (see below), whose sum is σ = 16019965561840. Its totient is φ = 15968288252340.

The previous prime is 15994126907071. The next prime is 15994126907113. The reversal of 15994126907089 is 98070962149951.

15994126907089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-15994126907089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15994126907039) 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, 12919326447 + ... + 12919327684.

It is an arithmetic number, because the mean of its divisors is an integer number (4004991390460).

Almost surely, 2^{15994126907089} is an apocalyptic number.

It is an amenable number.

15994126907089 is a deficient number, since it is larger than the sum of its proper divisors (25838654751).

15994126907089 is an equidigital number, since it uses as much as digits as its factorization.

15994126907089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25838654750.

The product of its (nonzero) digits is 88179840, while the sum is 70.

The spelling of 15994126907089 in words is "fifteen trillion, nine hundred ninety-four billion, one hundred twenty-six million, nine hundred seven thousand, eighty-nine".