16391680900 has 243 divisors, whose sum is σ = 43492038597. Its totient is φ = 5346532800.

The previous prime is 16391680867. The next prime is 16391680901. The reversal of 16391680900 is 908619361.

The square root of 16391680900 is 128030.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5901005124 + 10490675776 = 76818^2 + 102424^2 .

It is not an unprimeable number, because it can be changed into a prime (16391680901) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 277825071 + ... + 277825129.

Almost surely, 2^16391680900 is an apocalyptic number.

16391680900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16391680900 is the 128030-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16391680900

16391680900 is an abundant number, since it is smaller than the sum of its proper divisors (27100357697).

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

16391680900 is a wasteful number, since it uses less digits than its factorization.

16391680900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 16391680900 in words is "sixteen billion, three hundred ninety-one million, six hundred eighty thousand, nine hundred".