29997918549 has 12 divisors (see below), whose sum is σ = 43333902976. Its totient is φ = 19996961832.

The previous prime is 29997918499. The next prime is 29997918593. The reversal of 29997918549 is 94581979992.

29997918549 is a `hidden beast` number, since 2 + 9 + 9 + 9 + 79 + 1 + 8 + 549 = 666.

It is not a de Polignac number, because 29997918549 - 2⁹ = 29997918037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997918749) 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 11 ways as a sum of consecutive naturals, for example, 16867 + ... + 245520.

Almost surely, 2^29997918549 is an apocalyptic number.

It is an amenable number.

29997918549 is a deficient number, since it is larger than the sum of its proper divisors (13335984427).

29997918549 is a wasteful number, since it uses less digits than its factorization.

29997918549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275096 (or 275093 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 72.

The spelling of 29997918549 in words is "twenty-nine billion, nine hundred ninety-seven million, nine hundred eighteen thousand, five hundred forty-nine".