28258765061 has 2 divisors, whose sum is σ = 28258765062. Its totient is φ = 28258765060.

The previous prime is 28258765039. The next prime is 28258765081. The reversal of 28258765061 is 16056785282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21559342561 + 6699422500 = 146831^2 + 81850^2 .

It is a cyclic number.

It is not a de Polignac number, because 28258765061 - 2¹⁸ = 28258502917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28258765001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14129382530 + 14129382531.

It is an arithmetic number, because the mean of its divisors is an integer number (14129382531).

Almost surely, 2^28258765061 is an apocalyptic number.

It is an amenable number.

28258765061 is a deficient number, since it is larger than the sum of its proper divisors (1).

28258765061 is an equidigital number, since it uses as much as digits as its factorization.

28258765061 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 50.

The spelling of 28258765061 in words is "twenty-eight billion, two hundred fifty-eight million, seven hundred sixty-five thousand, sixty-one".