28194845213 has 2 divisors, whose sum is σ = 28194845214. Its totient is φ = 28194845212.

The previous prime is 28194845177. The next prime is 28194845257. The reversal of 28194845213 is 31254849182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23365568164 + 4829277049 = 152858^2 + 69493^2 .

It is a cyclic number.

It is not a de Polignac number, because 28194845213 - 2¹⁰ = 28194844189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28194844213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14097422606 + 14097422607.

It is an arithmetic number, because the mean of its divisors is an integer number (14097422607).

Almost surely, 2^28194845213 is an apocalyptic number.

It is an amenable number.

28194845213 is a deficient number, since it is larger than the sum of its proper divisors (1).

28194845213 is an equidigital number, since it uses as much as digits as its factorization.

28194845213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 552960, while the sum is 47.

The spelling of 28194845213 in words is "twenty-eight billion, one hundred ninety-four million, eight hundred forty-five thousand, two hundred thirteen".