28456725757 has 2 divisors, whose sum is σ = 28456725758. Its totient is φ = 28456725756.

The previous prime is 28456725751. The next prime is 28456725823. The reversal of 28456725757 is 75752765482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27416405241 + 1040320516 = 165579^2 + 32254^2 .

It is a cyclic number.

It is not a de Polignac number, because 28456725757 - 2³ = 28456725749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28456725751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14228362878 + 14228362879.

It is an arithmetic number, because the mean of its divisors is an integer number (14228362879).

Almost surely, 2^28456725757 is an apocalyptic number.

It is an amenable number.

28456725757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28456725757 is an equidigital number, since it uses as much as digits as its factorization.

28456725757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928000, while the sum is 58.

The spelling of 28456725757 in words is "twenty-eight billion, four hundred fifty-six million, seven hundred twenty-five thousand, seven hundred fifty-seven".