15999022113312 has 384 divisors, whose sum is σ = 48798933926400. Its totient is φ = 4495410855936.

The previous prime is 15999022113301. The next prime is 15999022113317. The reversal of 15999022113312 is 21331122099951.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14170966764 + ... + 14170967892.

It is an arithmetic number, because the mean of its divisors is an integer number (127080557100).

Almost surely, 2^{15999022113312} is an apocalyptic number.

15999022113312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15999022113312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24399466963200).

15999022113312 is an abundant number, since it is smaller than the sum of its proper divisors (32799911813088).

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

15999022113312 is a wasteful number, since it uses less digits than its factorization.

15999022113312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 48.

The spelling of 15999022113312 in words is "fifteen trillion, nine hundred ninety-nine billion, twenty-two million, one hundred thirteen thousand, three hundred twelve".