15999001200 has 960 divisors, whose sum is σ = 71364321280. Its totient is φ = 3314442240.

The previous prime is 15999001163. The next prime is 15999001219. The reversal of 15999001200 is 210099951.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 71744289 + ... + 71744511.

Almost surely, 2^15999001200 is an apocalyptic number.

15999001200 is a gapful number since it is divisible by the number (10) 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 15999001200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35682160640).

15999001200 is an abundant number, since it is smaller than the sum of its proper divisors (55365320080).

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

15999001200 is a wasteful number, since it uses less digits than its factorization.

15999001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 36.

The spelling of 15999001200 in words is "fifteen billion, nine hundred ninety-nine million, one thousand, two hundred".