28399713016601 has 2 divisors, whose sum is σ = 28399713016602. Its totient is φ = 28399713016600.

The previous prime is 28399713016541. The next prime is 28399713016709. The reversal of 28399713016601 is 10661031799382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24560934898201 + 3838778118400 = 4955899^2 + 1959280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28399713016601 is a prime.

It is not a weakly prime, because it can be changed into another prime (28399713015601) 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, 14199856508300 + 14199856508301.

It is an arithmetic number, because the mean of its divisors is an integer number (14199856508301).

Almost surely, 2^{28399713016601} is an apocalyptic number.

It is an amenable number.

28399713016601 is a deficient number, since it is larger than the sum of its proper divisors (1).

28399713016601 is an equidigital number, since it uses as much as digits as its factorization.

28399713016601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 28399713016601 in words is "twenty-eight trillion, three hundred ninety-nine billion, seven hundred thirteen million, sixteen thousand, six hundred one".