12621662251136 has 32 divisors (see below), whose sum is σ = 25144924026000. Its totient is φ = 6310779358464.

The previous prime is 12621662251097. The next prime is 12621662251151. The reversal of 12621662251136 is 63115226612621.

12621662251136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

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, 18814415 + ... + 19473713.

Almost surely, 2^{12621662251136} is an apocalyptic number.

12621662251136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12621662251136 is a deficient number, since it is larger than the sum of its proper divisors (12523261774864).

12621662251136 is an equidigital number, since it uses as much as digits as its factorization.

12621662251136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808876 (or 808864 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

Adding to 12621662251136 its reverse (63115226612621), we get a palindrome (75736888863757).

The spelling of 12621662251136 in words is "twelve trillion, six hundred twenty-one billion, six hundred sixty-two million, two hundred fifty-one thousand, one hundred thirty-six".