16191793920 has 288 divisors, whose sum is σ = 56806848000. Its totient is φ = 3912302592.

The previous prime is 16191793903. The next prime is 16191793963. The reversal of 16191793920 is 2939719161.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16191793920.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1673256 + ... + 1682904.

It is an arithmetic number, because the mean of its divisors is an integer number (197246000).

Almost surely, 2^16191793920 is an apocalyptic number.

16191793920 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 16191793920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28403424000).

16191793920 is an abundant number, since it is smaller than the sum of its proper divisors (40615054080).

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

16191793920 is a wasteful number, since it uses less digits than its factorization.

16191793920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9715 (or 9701 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 48.

The spelling of 16191793920 in words is "sixteen billion, one hundred ninety-one million, seven hundred ninety-three thousand, nine hundred twenty".