12540864196 has 81 divisors (see below), whose sum is σ = 27008151597. Its totient is φ = 5079684960.

The previous prime is 12540864191. The next prime is 12540864199. The reversal of 12540864196 is 69146804521.

It is a happy number.

The square root of 12540864196 is 111986.

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., 59505796 + 12481358400 = 7714^2 + 111720^2 .

It is not an unprimeable number, because it can be changed into a prime (12540864191) 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, 29788066 + ... + 29788486.

Almost surely, 2^12540864196 is an apocalyptic number.

12540864196 is the 111986-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12540864196

12540864196 is an abundant number, since it is smaller than the sum of its proper divisors (14467287401).

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

12540864196 is an equidigital number, since it uses as much as digits as its factorization.

12540864196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 12540864196 in words is "twelve billion, five hundred forty million, eight hundred sixty-four thousand, one hundred ninety-six".