28272481169 has 2 divisors, whose sum is σ = 28272481170. Its totient is φ = 28272481168.

The previous prime is 28272481079. The next prime is 28272481207. The reversal of 28272481169 is 96118427282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14796289600 + 13476191569 = 121640^2 + 116087^2 .

It is a cyclic number.

It is not a de Polignac number, because 28272481169 - 2⁸ = 28272480913 is a prime.

It is a super-2 number, since 2×28272481169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28272481469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14136240584 + 14136240585.

It is an arithmetic number, because the mean of its divisors is an integer number (14136240585).

Almost surely, 2^28272481169 is an apocalyptic number.

It is an amenable number.

28272481169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28272481169 is an equidigital number, since it uses as much as digits as its factorization.

28272481169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 50.

The spelling of 28272481169 in words is "twenty-eight billion, two hundred seventy-two million, four hundred eighty-one thousand, one hundred sixty-nine".