28259535173 has 2 divisors, whose sum is σ = 28259535174. Its totient is φ = 28259535172.

The previous prime is 28259535079. The next prime is 28259535193. The reversal of 28259535173 is 37153595282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27998324929 + 261210244 = 167327^2 + 16162^2 .

It is a cyclic number.

It is not a de Polignac number, because 28259535173 - 2²⁴ = 28242757957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28259535193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14129767586 + 14129767587.

It is an arithmetic number, because the mean of its divisors is an integer number (14129767587).

Almost surely, 2^28259535173 is an apocalyptic number.

It is an amenable number.

28259535173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28259535173 is an equidigital number, since it uses as much as digits as its factorization.

28259535173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 50.

The spelling of 28259535173 in words is "twenty-eight billion, two hundred fifty-nine million, five hundred thirty-five thousand, one hundred seventy-three".