12646536771605 has 8 divisors (see below), whose sum is σ = 16555466319264. Its totient is φ = 9197481288400.

The previous prime is 12646536771587. The next prime is 12646536771611. The reversal of 12646536771605 is 50617763564621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12646536771605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114968516051 + ... + 114968516160.

It is an arithmetic number, because the mean of its divisors is an integer number (2069433289908).

Almost surely, 2^{12646536771605} is an apocalyptic number.

It is an amenable number.

12646536771605 is a deficient number, since it is larger than the sum of its proper divisors (3908929547659).

12646536771605 is a wasteful number, since it uses less digits than its factorization.

12646536771605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229937032227.

The product of its (nonzero) digits is 38102400, while the sum is 59.

The spelling of 12646536771605 in words is "twelve trillion, six hundred forty-six billion, five hundred thirty-six million, seven hundred seventy-one thousand, six hundred five".