29997506888881 has 16 divisors (see below), whose sum is σ = 35190015100416. Its totient is φ = 25037340181056.

The previous prime is 29997506888851. The next prime is 29997506888891. The reversal of 29997506888881 is 18888860579992.

It is not a de Polignac number, because 29997506888881 - 2¹¹ = 29997506886833 is a prime.

It is a super-2 number, since 2×29997506888881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29997506888792 and 29997506888801.

It is not an unprimeable number, because it can be changed into a prime (29997506888851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231351006 + ... + 231480631.

It is an arithmetic number, because the mean of its divisors is an integer number (2199375943776).

Almost surely, 2^{29997506888881} is an apocalyptic number.

It is an amenable number.

29997506888881 is a deficient number, since it is larger than the sum of its proper divisors (5192508211535).

29997506888881 is a wasteful number, since it uses less digits than its factorization.

29997506888881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462831888.

The product of its (nonzero) digits is 10032906240, while the sum is 88.

The spelling of 29997506888881 in words is "twenty-nine trillion, nine hundred ninety-seven billion, five hundred six million, eight hundred eighty-eight thousand, eight hundred eighty-one".