99916681216 has 117 divisors (see below), whose sum is σ = 220114965553. Its totient is φ = 45315522560.

The previous prime is 99916681211. The next prime is 99916681223. The reversal of 99916681216 is 61218661999.

The square root of 99916681216 is 316096.

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

99916681216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 61060386816 + 38856294400 = 247104^2 + 197120^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99916681211) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 222531360 + ... + 222531808.

Almost surely, 2^99916681216 is an apocalyptic number.

99916681216 is the 316096-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99916681216

99916681216 is an abundant number, since it is smaller than the sum of its proper divisors (120198284337).

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

99916681216 is an frugal number, since it uses more digits than its factorization.

99916681216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 462 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 58.

The spelling of 99916681216 in words is "ninety-nine billion, nine hundred sixteen million, six hundred eighty-one thousand, two hundred sixteen".