29998399928461 has 2 divisors, whose sum is σ = 29998399928462. Its totient is φ = 29998399928460.

The previous prime is 29998399928459. The next prime is 29998399928533. The reversal of 29998399928461 is 16482999389992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19463149830436 + 10535250098025 = 4411706^2 + 3245805^2 .

It is a cyclic number.

It is not a de Polignac number, because 29998399928461 - 2¹ = 29998399928459 is a prime.

Together with 29998399928459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29998399926461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14999199964230 + 14999199964231.

It is an arithmetic number, because the mean of its divisors is an integer number (14999199964231).

Almost surely, 2^{29998399928461} is an apocalyptic number.

It is an amenable number.

29998399928461 is a deficient number, since it is larger than the sum of its proper divisors (1).

29998399928461 is an equidigital number, since it uses as much as digits as its factorization.

29998399928461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9795520512, while the sum is 88.

The spelling of 29998399928461 in words is "twenty-nine trillion, nine hundred ninety-eight billion, three hundred ninety-nine million, nine hundred twenty-eight thousand, four hundred sixty-one".