12640163336 has 16 divisors (see below), whose sum is σ = 23718186240. Its totient is φ = 6315313680.

The previous prime is 12640163303. The next prime is 12640163351. The reversal of 12640163336 is 63336104621.

It is a junction number, because it is equal to n+sod(n) for n = 12640163296 and 12640163305.

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, 584720 + ... + 605951.

It is an arithmetic number, because the mean of its divisors is an integer number (1482386640).

Almost surely, 2^12640163336 is an apocalyptic number.

It is an amenable number.

12640163336 is a deficient number, since it is larger than the sum of its proper divisors (11078022904).

12640163336 is a wasteful number, since it uses less digits than its factorization.

12640163336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192004 (or 1192000 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

Adding to 12640163336 its reverse (63336104621), we get a palindrome (75976267957).

The spelling of 12640163336 in words is "twelve billion, six hundred forty million, one hundred sixty-three thousand, three hundred thirty-six".