29681136656 has 40 divisors (see below), whose sum is σ = 58904961984. Its totient is φ = 14480565120.

The previous prime is 29681136643. The next prime is 29681136673. The reversal of 29681136656 is 65663118692.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 29681136598 and 29681136607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664301 + ... + 707571.

Almost surely, 2^29681136656 is an apocalyptic number.

It is an amenable number.

29681136656 is a deficient number, since it is larger than the sum of its proper divisors (29223825328).

29681136656 is a wasteful number, since it uses less digits than its factorization.

29681136656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44319 (or 44313 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The spelling of 29681136656 in words is "twenty-nine billion, six hundred eighty-one million, one hundred thirty-six thousand, six hundred fifty-six".