28601824189 has 2 divisors, whose sum is σ = 28601824190. Its totient is φ = 28601824188.

The previous prime is 28601824187. The next prime is 28601824231. The reversal of 28601824189 is 98142810682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17651248164 + 10950576025 = 132858^2 + 104645^2 .

It is a cyclic number.

It is not a de Polignac number, because 28601824189 - 2¹ = 28601824187 is a prime.

Together with 28601824187, 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 (28601824183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14300912094 + 14300912095.

It is an arithmetic number, because the mean of its divisors is an integer number (14300912095).

Almost surely, 2^28601824189 is an apocalyptic number.

It is an amenable number.

28601824189 is a deficient number, since it is larger than the sum of its proper divisors (1).

28601824189 is an equidigital number, since it uses as much as digits as its factorization.

28601824189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 28601824189 in words is "twenty-eight billion, six hundred one million, eight hundred twenty-four thousand, one hundred eighty-nine".