28577511257 has 2 divisors, whose sum is σ = 28577511258. Its totient is φ = 28577511256.

The previous prime is 28577511239. The next prime is 28577511353. The reversal of 28577511257 is 75211577582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26871077776 + 1706433481 = 163924^2 + 41309^2 .

It is a cyclic number.

It is not a de Polignac number, because 28577511257 - 2¹⁴ = 28577494873 is a prime.

It is not a weakly prime, because it can be changed into another prime (28577511217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14288755628 + 14288755629.

It is an arithmetic number, because the mean of its divisors is an integer number (14288755629).

Almost surely, 2^28577511257 is an apocalyptic number.

It is an amenable number.

28577511257 is a deficient number, since it is larger than the sum of its proper divisors (1).

28577511257 is an equidigital number, since it uses as much as digits as its factorization.

28577511257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1372000, while the sum is 50.

The spelling of 28577511257 in words is "twenty-eight billion, five hundred seventy-seven million, five hundred eleven thousand, two hundred fifty-seven".