28662625457 has 2 divisors, whose sum is σ = 28662625458. Its totient is φ = 28662625456.

The previous prime is 28662625391. The next prime is 28662625463. The reversal of 28662625457 is 75452626682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22512301681 + 6150323776 = 150041^2 + 78424^2 .

It is a cyclic number.

It is not a de Polignac number, because 28662625457 - 2¹⁰ = 28662624433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28662625399 and 28662625408.

It is not a weakly prime, because it can be changed into another prime (28662625357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14331312728 + 14331312729.

It is an arithmetic number, because the mean of its divisors is an integer number (14331312729).

Almost surely, 2^28662625457 is an apocalyptic number.

It is an amenable number.

28662625457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28662625457 is an equidigital number, since it uses as much as digits as its factorization.

28662625457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9676800, while the sum is 53.

The spelling of 28662625457 in words is "twenty-eight billion, six hundred sixty-two million, six hundred twenty-five thousand, four hundred fifty-seven".