29681135369 has 4 divisors (see below), whose sum is σ = 30184205520. Its totient is φ = 29178065220.

The previous prime is 29681135359. The next prime is 29681135377. The reversal of 29681135369 is 96353118692.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29681135369 - 2⁴ = 29681135353 is a prime.

It is a super-2 number, since 2×29681135369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 29681135369.

It is not an unprimeable number, because it can be changed into a prime (29681135359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251534987 + ... + 251535104.

It is an arithmetic number, because the mean of its divisors is an integer number (7546051380).

Almost surely, 2^29681135369 is an apocalyptic number.

It is an amenable number.

29681135369 is a deficient number, since it is larger than the sum of its proper divisors (503070151).

29681135369 is an equidigital number, since it uses as much as digits as its factorization.

29681135369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503070150.

The product of its digits is 2099520, while the sum is 53.

The spelling of 29681135369 in words is "twenty-nine billion, six hundred eighty-one million, one hundred thirty-five thousand, three hundred sixty-nine".