29997506889506 has 16 divisors (see below), whose sum is σ = 48782729331000. Its totient is φ = 13752083693568.

The previous prime is 29997506889479. The next prime is 29997506889521. The reversal of 29997506889506 is 60598860579992.

It can be written as a sum of positive squares in 4 ways, for example, as 9232123710481 + 20765383179025 = 3038441^2 + 4556905^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3871641311 + ... + 3871649058.

Almost surely, 2^{29997506889506} is an apocalyptic number.

29997506889506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

29997506889506 is a deficient number, since it is larger than the sum of its proper divisors (18785222441494).

29997506889506 is a wasteful number, since it uses less digits than its factorization.

29997506889506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7743290533.

The product of its (nonzero) digits is 5290790400, while the sum is 83.

The spelling of 29997506889506 in words is "twenty-nine trillion, nine hundred ninety-seven billion, five hundred six million, eight hundred eighty-nine thousand, five hundred six".