2163640423012 has 12 divisors (see below), whose sum is σ = 3800446469820. Its totient is φ = 1077798574496.

The previous prime is 2163640422989. The next prime is 2163640423051. The reversal of 2163640423012 is 2103240463612.

It can be written as a sum of positive squares in 2 ways, for example, as 700759848996 + 1462880574016 = 837114^2 + 1209496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005408043 + ... + 1005410194.

It is an arithmetic number, because the mean of its divisors is an integer number (316703872485).

Almost surely, 2^{2163640423012} is an apocalyptic number.

It is an amenable number.

2163640423012 is a deficient number, since it is larger than the sum of its proper divisors (1636806046808).

2163640423012 is a wasteful number, since it uses less digits than its factorization.

2163640423012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010818510 (or 2010818508 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 2163640423012 its reverse (2103240463612), we get a palindrome (4266880886624).

The spelling of 2163640423012 in words is "two trillion, one hundred sixty-three billion, six hundred forty million, four hundred twenty-three thousand, twelve".