28511157173 has 2 divisors, whose sum is σ = 28511157174. Its totient is φ = 28511157172.

The previous prime is 28511157149. The next prime is 28511157197. The reversal of 28511157173 is 37175111582.

It is a balanced prime because it is at equal distance from previous prime (28511157149) and next prime (28511157197).

It can be written as a sum of positive squares in only one way, i.e., 28393261009 + 117896164 = 168503^2 + 10858^2 .

It is a cyclic number.

It is not a de Polignac number, because 28511157173 - 2³⁰ = 27437415349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28511157173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28511157973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14255578586 + 14255578587.

It is an arithmetic number, because the mean of its divisors is an integer number (14255578587).

Almost surely, 2^28511157173 is an apocalyptic number.

It is an amenable number.

28511157173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28511157173 is an equidigital number, since it uses as much as digits as its factorization.

28511157173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 41.

The spelling of 28511157173 in words is "twenty-eight billion, five hundred eleven million, one hundred fifty-seven thousand, one hundred seventy-three".