12993645691 has 64 divisors (see below), whose sum is σ = 16063488000. Its totient is φ = 10387491840.

The previous prime is 12993645689. The next prime is 12993645703. The reversal of 12993645691 is 19654639921.

It is not a de Polignac number, because 12993645691 - 2¹ = 12993645689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12993645611) 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 63 ways as a sum of consecutive naturals, for example, 15673465 + ... + 15674293.

It is an arithmetic number, because the mean of its divisors is an integer number (250992000).

Almost surely, 2^12993645691 is an apocalyptic number.

12993645691 is a deficient number, since it is larger than the sum of its proper divisors (3069842309).

12993645691 is a wasteful number, since it uses less digits than its factorization.

12993645691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004.

The product of its digits is 3149280, while the sum is 55.

The spelling of 12993645691 in words is "twelve billion, nine hundred ninety-three million, six hundred forty-five thousand, six hundred ninety-one".