15991143168 has 864 divisors, whose sum is σ = 60407689216. Its totient is φ = 3649536000.

The previous prime is 15991143167. The next prime is 15991143169. The reversal of 15991143168 is 86134119951.

It is an interprime number because it is at equal distance from previous prime (15991143167) and next prime (15991143169).

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 (15991143167) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 262149858 + ... + 262149918.

Almost surely, 2^15991143168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15991143168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30203844608).

15991143168 is an abundant number, since it is smaller than the sum of its proper divisors (44416546048).

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

15991143168 is a wasteful number, since it uses less digits than its factorization.

15991143168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 128 counting only the distinct ones).

The product of its digits is 233280, while the sum is 48.

The spelling of 15991143168 in words is "fifteen billion, nine hundred ninety-one million, one hundred forty-three thousand, one hundred sixty-eight".