29447128972799 has 4 divisors (see below), whose sum is σ = 29455501773864. Its totient is φ = 29438756171736.

The previous prime is 29447128972783. The next prime is 29447128972801. The reversal of 29447128972799 is 99727982174492.

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

It is a cyclic number.

It is not a de Polignac number, because 29447128972799 - 2⁴ = 29447128972783 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 (29447128972739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4186395257 + ... + 4186402290.

It is an arithmetic number, because the mean of its divisors is an integer number (7363875443466).

Almost surely, 2^{29447128972799} is an apocalyptic number.

29447128972799 is a deficient number, since it is larger than the sum of its proper divisors (8372801065).

29447128972799 is an equidigital number, since it uses as much as digits as its factorization.

29447128972799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8372801064.

The product of its digits is 2304433152, while the sum is 80.

The spelling of 29447128972799 in words is "twenty-nine trillion, four hundred forty-seven billion, one hundred twenty-eight million, nine hundred seventy-two thousand, seven hundred ninety-nine".