12006621645 has 64 divisors (see below), whose sum is σ = 20745953280. Its totient is φ = 5910409728.

The previous prime is 12006621547. The next prime is 12006621659. The reversal of 12006621645 is 54612660021.

12006621645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12006621645 - 2¹⁸ = 12006359501 is a prime.

It is a super-3 number, since 3×12006621645³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3119112 + ... + 3122958.

It is an arithmetic number, because the mean of its divisors is an integer number (324155520).

Almost surely, 2^12006621645 is an apocalyptic number.

12006621645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12006621645 is a deficient number, since it is larger than the sum of its proper divisors (8739331635).

12006621645 is a wasteful number, since it uses less digits than its factorization.

12006621645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 12006621645 in words is "twelve billion, six million, six hundred twenty-one thousand, six hundred forty-five".