28059551857 has 2 divisors, whose sum is σ = 28059551858. Its totient is φ = 28059551856.

The previous prime is 28059551851. The next prime is 28059551869. The reversal of 28059551857 is 75815595082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25902971136 + 2156580721 = 160944^2 + 46439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28059551857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28059551798 and 28059551807.

It is not a weakly prime, because it can be changed into another prime (28059551851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14029775928 + 14029775929.

It is an arithmetic number, because the mean of its divisors is an integer number (14029775929).

Almost surely, 2^28059551857 is an apocalyptic number.

It is an amenable number.

28059551857 is a deficient number, since it is larger than the sum of its proper divisors (1).

28059551857 is an equidigital number, since it uses as much as digits as its factorization.

28059551857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040000, while the sum is 55.

The spelling of 28059551857 in words is "twenty-eight billion, fifty-nine million, five hundred fifty-one thousand, eight hundred fifty-seven".