12006646505 has 16 divisors (see below), whose sum is σ = 16486208640. Its totient is φ = 8223153792.

The previous prime is 12006646501. The next prime is 12006646523. The reversal of 12006646505 is 50564660021.

It is not a de Polignac number, because 12006646505 - 2² = 12006646501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (12006646501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178460 + ... + 236349.

It is an arithmetic number, because the mean of its divisors is an integer number (1030388040).

Almost surely, 2^12006646505 is an apocalyptic number.

It is an amenable number.

12006646505 is a deficient number, since it is larger than the sum of its proper divisors (4479562135).

12006646505 is an equidigital number, since it uses as much as digits as its factorization.

12006646505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415648.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12006646505 in words is "twelve billion, six million, six hundred forty-six thousand, five hundred five".