16309726812 has 60 divisors (see below), whose sum is σ = 42689104920. Its totient is φ = 5429912544.

The previous prime is 16309726793. The next prime is 16309726843. The reversal of 16309726812 is 21862790361.

16309726812 is a `hidden beast` number, since 1 + 630 + 9 + 7 + 2 + 6 + 8 + 1 + 2 = 666.

16309726812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 237514 + ... + 298382.

It is an arithmetic number, because the mean of its divisors is an integer number (711485082).

Almost surely, 2^16309726812 is an apocalyptic number.

16309726812 is a gapful number since it is divisible by the number (12) 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 16309726812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21344552460).

16309726812 is an abundant number, since it is smaller than the sum of its proper divisors (26379378108).

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

16309726812 is a wasteful number, since it uses less digits than its factorization.

16309726812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61712 (or 61701 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 16309726812 in words is "sixteen billion, three hundred nine million, seven hundred twenty-six thousand, eight hundred twelve".