28502257757 has 2 divisors, whose sum is σ = 28502257758. Its totient is φ = 28502257756.

The previous prime is 28502257711. The next prime is 28502257837. The reversal of 28502257757 is 75775220582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19603920196 + 8898337561 = 140014^2 + 94331^2 .

It is a cyclic number.

It is not a de Polignac number, because 28502257757 - 2²⁰ = 28501209181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28502257957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14251128878 + 14251128879.

It is an arithmetic number, because the mean of its divisors is an integer number (14251128879).

Almost surely, 2^28502257757 is an apocalyptic number.

It is an amenable number.

28502257757 is a deficient number, since it is larger than the sum of its proper divisors (1).

28502257757 is an equidigital number, since it uses as much as digits as its factorization.

28502257757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2744000, while the sum is 50.

The spelling of 28502257757 in words is "twenty-eight billion, five hundred two million, two hundred fifty-seven thousand, seven hundred fifty-seven".