13212263644 has 12 divisors (see below), whose sum is σ = 23303521024. Its totient is φ = 6554114784.

The previous prime is 13212263639. The next prime is 13212263657. The reversal of 13212263644 is 44636221231.

It is a congruent number.

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, 13003689 + ... + 13004704.

Almost surely, 2^13212263644 is an apocalyptic number.

It is an amenable number.

13212263644 is a deficient number, since it is larger than the sum of its proper divisors (10091257380).

13212263644 is a wasteful number, since it uses less digits than its factorization.

13212263644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26008524 (or 26008522 counting only the distinct ones).

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

Adding to 13212263644 its reverse (44636221231), we get a palindrome (57848484875).

The spelling of 13212263644 in words is "thirteen billion, two hundred twelve million, two hundred sixty-three thousand, six hundred forty-four".