28506862057 has 2 divisors, whose sum is σ = 28506862058. Its totient is φ = 28506862056.

The previous prime is 28506862031. The next prime is 28506862061. The reversal of 28506862057 is 75026860582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19554106896 + 8952755161 = 139836^2 + 94619^2 .

It is a cyclic number.

It is not a de Polignac number, because 28506862057 - 2¹⁵ = 28506829289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28506862057.

It is not a weakly prime, because it can be changed into another prime (28506862067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14253431028 + 14253431029.

It is an arithmetic number, because the mean of its divisors is an integer number (14253431029).

Almost surely, 2^28506862057 is an apocalyptic number.

It is an amenable number.

28506862057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28506862057 is an equidigital number, since it uses as much as digits as its factorization.

28506862057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 28506862057 in words is "twenty-eight billion, five hundred six million, eight hundred sixty-two thousand, fifty-seven".