29845571406991 has 2 divisors, whose sum is σ = 29845571406992. Its totient is φ = 29845571406990.

The previous prime is 29845571406941. The next prime is 29845571407009. The reversal of 29845571406991 is 19960417554892.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29845571406991 - 2⁹ = 29845571406479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29845571406991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29845571406941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14922785703495 + 14922785703496.

It is an arithmetic number, because the mean of its divisors is an integer number (14922785703496).

Almost surely, 2^{29845571406991} is an apocalyptic number.

29845571406991 is a deficient number, since it is larger than the sum of its proper divisors (1).

29845571406991 is an equidigital number, since it uses as much as digits as its factorization.

29845571406991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 195955200, while the sum is 70.

The spelling of 29845571406991 in words is "twenty-nine trillion, eight hundred forty-five billion, five hundred seventy-one million, four hundred six thousand, nine hundred ninety-one".