12198318916 has 81 divisors (see below), whose sum is σ = 26034801471. Its totient is φ = 5000553096.

The previous prime is 12198318911. The next prime is 12198318961. The reversal of 12198318916 is 61981389121.

The square root of 12198318916 is 110446.

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

It is a Harshad number since it is a multiple of its sum of digits (49).

Its product of digits (186624) is a multiple of the sum of its prime divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 12198318916.

It is not an unprimeable number, because it can be changed into a prime (12198318911) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 530361681 + ... + 530361703.

Almost surely, 2^12198318916 is an apocalyptic number.

12198318916 is the 110446-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12198318916

12198318916 is an abundant number, since it is smaller than the sum of its proper divisors (13836482555).

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

12198318916 is an frugal number, since it uses more digits than its factorization.

12198318916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 32 counting only the distinct ones).

The product of its digits is 186624, while the sum is 49.

Multiplying 12198318916 by its sum of digits (49), we get a square (597717626884 = 773122²).

12198318916 divided by its sum of digits (49) gives a square (248945284 = 15778²).

The spelling of 12198318916 in words is "twelve billion, one hundred ninety-eight million, three hundred eighteen thousand, nine hundred sixteen".