28287786637057 has 2 divisors, whose sum is σ = 28287786637058. Its totient is φ = 28287786637056.

The previous prime is 28287786636979. The next prime is 28287786637069. The reversal of 28287786637057 is 75073668778282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27953119759041 + 334666878016 = 5287071^2 + 578504^2 .

It is a cyclic number.

It is not a de Polignac number, because 28287786637057 - 2²⁷ = 28287652419329 is a prime.

It is not a weakly prime, because it can be changed into another prime (28287786637087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14143893318528 + 14143893318529.

It is an arithmetic number, because the mean of its divisors is an integer number (14143893318529).

Almost surely, 2^{28287786637057} is an apocalyptic number.

It is an amenable number.

28287786637057 is a deficient number, since it is larger than the sum of its proper divisors (1).

28287786637057 is an equidigital number, since it uses as much as digits as its factorization.

28287786637057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2655313920, while the sum is 76.

The spelling of 28287786637057 in words is "twenty-eight trillion, two hundred eighty-seven billion, seven hundred eighty-six million, six hundred thirty-seven thousand, fifty-seven".