13229618641 has 2 divisors, whose sum is σ = 13229618642. Its totient is φ = 13229618640.

The previous prime is 13229618639. The next prime is 13229618681. The reversal of 13229618641 is 14681692231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7650126225 + 5579492416 = 87465^2 + 74696^2 .

It is a cyclic number.

It is not a de Polignac number, because 13229618641 - 2¹ = 13229618639 is a prime.

Together with 13229618639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13229618681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6614809320 + 6614809321.

It is an arithmetic number, because the mean of its divisors is an integer number (6614809321).

Almost surely, 2^13229618641 is an apocalyptic number.

It is an amenable number.

13229618641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13229618641 is an equidigital number, since it uses as much as digits as its factorization.

13229618641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The spelling of 13229618641 in words is "thirteen billion, two hundred twenty-nine million, six hundred eighteen thousand, six hundred forty-one".