28033594621 has 2 divisors, whose sum is σ = 28033594622. Its totient is φ = 28033594620.

The previous prime is 28033594613. The next prime is 28033594627. The reversal of 28033594621 is 12649533082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17871946596 + 10161648025 = 133686^2 + 100805^2 .

It is a cyclic number.

It is not a de Polignac number, because 28033594621 - 2³ = 28033594613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28033594627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14016797310 + 14016797311.

It is an arithmetic number, because the mean of its divisors is an integer number (14016797311).

Almost surely, 2^28033594621 is an apocalyptic number.

It is an amenable number.

28033594621 is a deficient number, since it is larger than the sum of its proper divisors (1).

28033594621 is an equidigital number, since it uses as much as digits as its factorization.

28033594621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 28033594621 in words is "twenty-eight billion, thirty-three million, five hundred ninety-four thousand, six hundred twenty-one".