15999022113318 has 24 divisors (see below), whose sum is σ = 35232819191856. Its totient is φ = 5245581020400.

The previous prime is 15999022113317. The next prime is 15999022113359. The reversal of 15999022113318 is 81331122099951.

It is a happy number.

15999022113318 is a `hidden beast` number, since 1 + 5 + 9 + 9 + 90 + 2 + 211 + 331 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15999022113317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7285528098 + ... + 7285530293.

It is an arithmetic number, because the mean of its divisors is an integer number (1468034132994).

Almost surely, 2^{15999022113318} is an apocalyptic number.

15999022113318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15999022113318 is an abundant number, since it is smaller than the sum of its proper divisors (19233797078538).

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

15999022113318 is a wasteful number, since it uses less digits than its factorization.

15999022113318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14571058460 (or 14571058457 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The spelling of 15999022113318 in words is "fifteen trillion, nine hundred ninety-nine billion, twenty-two million, one hundred thirteen thousand, three hundred eighteen".