12940545612 has 96 divisors (see below), whose sum is σ = 33179265280. Its totient is φ = 3910705920.

The previous prime is 12940545601. The next prime is 12940545613. The reversal of 12940545612 is 21654504921.

It is not an unprimeable number, because it can be changed into a prime (12940545613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 502023 + ... + 527169.

Almost surely, 2^12940545612 is an apocalyptic number.

12940545612 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 12940545612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16589632640).

12940545612 is an abundant number, since it is smaller than the sum of its proper divisors (20238719668).

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

12940545612 is a wasteful number, since it uses less digits than its factorization.

12940545612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25271 (or 25269 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 12940545612 in words is "twelve billion, nine hundred forty million, five hundred forty-five thousand, six hundred twelve".