29997506889505 has 4 divisors (see below), whose sum is σ = 35997008267412. Its totient is φ = 23998005511600.

The previous prime is 29997506889479. The next prime is 29997506889521. The reversal of 29997506889505 is 50598860579992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22378046535936 + 7619460353569 = 4730544^2 + 2760337^2 .

It is not a de Polignac number, because 29997506889505 - 2¹¹ = 29997506887457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2999750688946 + ... + 2999750688955.

It is an arithmetic number, because the mean of its divisors is an integer number (8999252066853).

Almost surely, 2^{29997506889505} is an apocalyptic number.

It is an amenable number.

29997506889505 is a deficient number, since it is larger than the sum of its proper divisors (5999501377907).

29997506889505 is an equidigital number, since it uses as much as digits as its factorization.

29997506889505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5999501377906.

The product of its (nonzero) digits is 4408992000, while the sum is 82.

The spelling of 29997506889505 in words is "twenty-nine trillion, nine hundred ninety-seven billion, five hundred six million, eight hundred eighty-nine thousand, five hundred five".