16391769688 has 64 divisors (see below), whose sum is σ = 35902656000. Its totient is φ = 7013170080.

The previous prime is 16391769677. The next prime is 16391769707. The reversal of 16391769688 is 88696719361.

It is a super-2 number, since 2×16391769688² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726731 + ... + 1736197.

It is an arithmetic number, because the mean of its divisors is an integer number (560979000).

Almost surely, 2^16391769688 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 16391769688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17951328000).

16391769688 is an abundant number, since it is smaller than the sum of its proper divisors (19510886312).

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

16391769688 is an equidigital number, since it uses as much as digits as its factorization.

16391769688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125 (or 10107 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 64.

The spelling of 16391769688 in words is "sixteen billion, three hundred ninety-one million, seven hundred sixty-nine thousand, six hundred eighty-eight".