29685649249 has 8 divisors (see below), whose sum is σ = 29776091400. Its totient is φ = 29595319296.

The previous prime is 29685649187. The next prime is 29685649277. The reversal of 29685649249 is 94294658692.

It can be written as a sum of positive squares in 4 ways, for example, as 17906454225 + 11779195024 = 133815^2 + 108532^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29685649249 - 2⁷ = 29685649121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29685649289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517977 + ... + 572425.

It is an arithmetic number, because the mean of its divisors is an integer number (3722011425).

Almost surely, 2^29685649249 is an apocalyptic number.

It is an amenable number.

29685649249 is a deficient number, since it is larger than the sum of its proper divisors (90442151).

29685649249 is a wasteful number, since it uses less digits than its factorization.

29685649249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56099.

The product of its digits is 67184640, while the sum is 64.

The spelling of 29685649249 in words is "twenty-nine billion, six hundred eighty-five million, six hundred forty-nine thousand, two hundred forty-nine".