12845631993 has 16 divisors (see below), whose sum is σ = 17496330240. Its totient is φ = 8379436176.

The previous prime is 12845631989. The next prime is 12845632001. The reversal of 12845631993 is 39913654821.

It is not a de Polignac number, because 12845631993 - 2² = 12845631989 is a prime.

It is a super-2 number, since 2×12845631993² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12845631923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711168 + ... + 729006.

It is an arithmetic number, because the mean of its divisors is an integer number (1093520640).

Almost surely, 2^12845631993 is an apocalyptic number.

It is an amenable number.

12845631993 is a deficient number, since it is larger than the sum of its proper divisors (4650698247).

12845631993 is a wasteful number, since it uses less digits than its factorization.

12845631993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22996.

The product of its digits is 1399680, while the sum is 51.

The spelling of 12845631993 in words is "twelve billion, eight hundred forty-five million, six hundred thirty-one thousand, nine hundred ninety-three".