29731730985 has 72 divisors (see below), whose sum is σ = 56706441792. Its totient is φ = 14399985600.

The previous prime is 29731730957. The next prime is 29731731019. The reversal of 29731730985 is 58903713792.

29731730985 is a `hidden beast` number, since 297 + 317 + 30 + 9 + 8 + 5 = 666.

It is not a de Polignac number, because 29731730985 - 2⁹ = 29731730473 is a prime.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 6373764 + ... + 6378426.

Almost surely, 2^29731730985 is an apocalyptic number.

It is an amenable number.

29731730985 is a deficient number, since it is larger than the sum of its proper divisors (26974710807).

29731730985 is a wasteful number, since it uses less digits than its factorization.

29731730985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867 (or 5853 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 29731730985 in words is "twenty-nine billion, seven hundred thirty-one million, seven hundred thirty thousand, nine hundred eighty-five".