12646535771 has 8 divisors (see below), whose sum is σ = 12828618000. Its totient is φ = 12465749920.

The previous prime is 12646535747. The next prime is 12646535779. The reversal of 12646535771 is 17753564621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12646535771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12646535779) 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 7 ways as a sum of consecutive naturals, for example, 304436 + ... + 343473.

It is an arithmetic number, because the mean of its divisors is an integer number (1603577250).

Almost surely, 2^12646535771 is an apocalyptic number.

12646535771 is a deficient number, since it is larger than the sum of its proper divisors (182082229).

12646535771 is a wasteful number, since it uses less digits than its factorization.

12646535771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648189.

The product of its digits is 1058400, while the sum is 47.

The spelling of 12646535771 in words is "twelve billion, six hundred forty-six million, five hundred thirty-five thousand, seven hundred seventy-one".