29649805871 has 24 divisors (see below), whose sum is σ = 35714157120. Its totient is φ = 24514228032.

The previous prime is 29649805831. The next prime is 29649805873. The reversal of 29649805871 is 17850894692.

It is not a de Polignac number, because 29649805871 - 2⁶ = 29649805807 is a prime.

It is a super-2 number, since 2×29649805871² (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 29649805871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29649805873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1557905 + ... + 1576821.

It is an arithmetic number, because the mean of its divisors is an integer number (1488089880).

Almost surely, 2^29649805871 is an apocalyptic number.

29649805871 is a deficient number, since it is larger than the sum of its proper divisors (6064351249).

29649805871 is a wasteful number, since it uses less digits than its factorization.

29649805871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20063 (or 20056 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 29649805871 in words is "twenty-nine billion, six hundred forty-nine million, eight hundred five thousand, eight hundred seventy-one".