12646534619 has 2 divisors, whose sum is σ = 12646534620. Its totient is φ = 12646534618.

The previous prime is 12646534603. The next prime is 12646534631. The reversal of 12646534619 is 91643564621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12646534619 - 2⁴ = 12646534603 is a prime.

It is a super-2 number, since 2×12646534619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12646534639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6323267309 + 6323267310.

It is an arithmetic number, because the mean of its divisors is an integer number (6323267310).

Almost surely, 2^12646534619 is an apocalyptic number.

12646534619 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646534619 is an equidigital number, since it uses as much as digits as its factorization.

12646534619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 47.

The spelling of 12646534619 in words is "twelve billion, six hundred forty-six million, five hundred thirty-four thousand, six hundred nineteen".