15994126907087 has 16 divisors (see below), whose sum is σ = 18731541625920. Its totient is φ = 13372837400832.

The previous prime is 15994126907071. The next prime is 15994126907113. The reversal of 15994126907087 is 78070962149951.

It is not a de Polignac number, because 15994126907087 - 2⁴ = 15994126907071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15994126903087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124533662 + ... + 124662027.

It is an arithmetic number, because the mean of its divisors is an integer number (1170721351620).

Almost surely, 2^{15994126907087} is an apocalyptic number.

15994126907087 is a deficient number, since it is larger than the sum of its proper divisors (2737414718833).

15994126907087 is a wasteful number, since it uses less digits than its factorization.

15994126907087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249195922.

The product of its (nonzero) digits is 68584320, while the sum is 68.

The spelling of 15994126907087 in words is "fifteen trillion, nine hundred ninety-four billion, one hundred twenty-six million, nine hundred seven thousand, eighty-seven".