29449665378817 has 2 divisors, whose sum is σ = 29449665378818. Its totient is φ = 29449665378816.

The previous prime is 29449665378799. The next prime is 29449665378841. The reversal of 29449665378817 is 71887356694492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20605798288321 + 8843867090496 = 4539361^2 + 2973864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29449665378817 is a prime.

It is a super-2 number, since 2×29449665378817² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29449665378857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14724832689408 + 14724832689409.

It is an arithmetic number, because the mean of its divisors is an integer number (14724832689409).

Almost surely, 2^{29449665378817} is an apocalyptic number.

It is an amenable number.

29449665378817 is a deficient number, since it is larger than the sum of its proper divisors (1).

29449665378817 is an equidigital number, since it uses as much as digits as its factorization.

29449665378817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4389396480, while the sum is 79.

The spelling of 29449665378817 in words is "twenty-nine trillion, four hundred forty-nine billion, six hundred sixty-five million, three hundred seventy-eight thousand, eight hundred seventeen".