28333903161601 has 4 divisors (see below), whose sum is σ = 28333914969604. Its totient is φ = 28333891353600.

The previous prime is 28333903161503. The next prime is 28333903161617. The reversal of 28333903161601 is 10616130933382.

It is a Cunningham number, because it is equal to 5322960²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26480904321600 + 1852998840001 = 5145960^2 + 1361249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28333903161601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28333903161631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879120 + ... + 7578961.

It is an arithmetic number, because the mean of its divisors is an integer number (7083478742401).

Almost surely, 2^{28333903161601} is an apocalyptic number.

It is an amenable number.

28333903161601 is a deficient number, since it is larger than the sum of its proper divisors (11808003).

28333903161601 is an equidigital number, since it uses as much as digits as its factorization.

28333903161601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11808002.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 28333903161601 in words is "twenty-eight trillion, three hundred thirty-three billion, nine hundred three million, one hundred sixty-one thousand, six hundred one".