28547488457 has 2 divisors, whose sum is σ = 28547488458. Its totient is φ = 28547488456.

The previous prime is 28547488363. The next prime is 28547488471. The reversal of 28547488457 is 75488474582.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27843594496 + 703893961 = 166864^2 + 26531^2 .

It is a cyclic number.

It is not a de Polignac number, because 28547488457 - 2³⁴ = 11367619273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28547488457.

It is not a weakly prime, because it can be changed into another prime (28547484457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14273744228 + 14273744229.

It is an arithmetic number, because the mean of its divisors is an integer number (14273744229).

Almost surely, 2^28547488457 is an apocalyptic number.

It is an amenable number.

28547488457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28547488457 is an equidigital number, since it uses as much as digits as its factorization.

28547488457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80281600, while the sum is 62.

The spelling of 28547488457 in words is "twenty-eight billion, five hundred forty-seven million, four hundred eighty-eight thousand, four hundred fifty-seven".