29967991638851 has 12 divisors (see below), whose sum is σ = 34862706806400. Its totient is φ = 25685389674000.

The previous prime is 29967991638847. The next prime is 29967991638869. The reversal of 29967991638851 is 15883619976992.

It is not a de Polignac number, because 29967991638851 - 2² = 29967991638847 is a prime.

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 29967991638851.

It is not an unprimeable number, because it can be changed into a prime (29967997638851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16513400 + ... + 18238101.

It is an arithmetic number, because the mean of its divisors is an integer number (2905225567200).

Almost surely, 2^{29967991638851} is an apocalyptic number.

29967991638851 is a deficient number, since it is larger than the sum of its proper divisors (4894715167549).

29967991638851 is a wasteful number, since it uses less digits than its factorization.

29967991638851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34769114 (or 34769107 counting only the distinct ones).

The product of its digits is 3174474240, while the sum is 83.

The spelling of 29967991638851 in words is "twenty-nine trillion, nine hundred sixty-seven billion, nine hundred ninety-one million, six hundred thirty-eight thousand, eight hundred fifty-one".