16193951568 has 240 divisors, whose sum is σ = 48478772160. Its totient is φ = 5230697472.

The previous prime is 16193951539. The next prime is 16193951623. The reversal of 16193951568 is 86515939161.

16193951568 is a `hidden beast` number, since 1 + 61 + 9 + 3 + 9 + 515 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18339255 + ... + 18340137.

It is an arithmetic number, because the mean of its divisors is an integer number (201994884).

Almost surely, 2^16193951568 is an apocalyptic number.

16193951568 is a gapful number since it is divisible by the number (18) 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 16193951568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24239386080).

16193951568 is an abundant number, since it is smaller than the sum of its proper divisors (32284820592).

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

16193951568 is an equidigital number, since it uses as much as digits as its factorization.

16193951568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1030 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 54.

The spelling of 16193951568 in words is "sixteen billion, one hundred ninety-three million, nine hundred fifty-one thousand, five hundred sixty-eight".