13643524969 has 2 divisors, whose sum is σ = 13643524970. Its totient is φ = 13643524968.

The previous prime is 13643524931. The next prime is 13643525029. The reversal of 13643524969 is 96942534631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13090334569 + 553190400 = 114413^2 + 23520^2 .

It is a cyclic number.

It is not a de Polignac number, because 13643524969 - 2²¹ = 13641427817 is a prime.

It is a super-2 number, since 2×13643524969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13643524919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6821762484 + 6821762485.

It is an arithmetic number, because the mean of its divisors is an integer number (6821762485).

Almost surely, 2^13643524969 is an apocalyptic number.

It is an amenable number.

13643524969 is a deficient number, since it is larger than the sum of its proper divisors (1).

13643524969 is an equidigital number, since it uses as much as digits as its factorization.

13643524969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 52.

The spelling of 13643524969 in words is "thirteen billion, six hundred forty-three million, five hundred twenty-four thousand, nine hundred sixty-nine".