28277105617 has 2 divisors, whose sum is σ = 28277105618. Its totient is φ = 28277105616.

The previous prime is 28277105611. The next prime is 28277105627. The reversal of 28277105617 is 71650177282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25548505921 + 2728599696 = 159839^2 + 52236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28277105617 is a prime.

It is not a weakly prime, because it can be changed into another prime (28277105611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14138552808 + 14138552809.

It is an arithmetic number, because the mean of its divisors is an integer number (14138552809).

Almost surely, 2^28277105617 is an apocalyptic number.

It is an amenable number.

28277105617 is a deficient number, since it is larger than the sum of its proper divisors (1).

28277105617 is an equidigital number, since it uses as much as digits as its factorization.

28277105617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 28277105617 in words is "twenty-eight billion, two hundred seventy-seven million, one hundred five thousand, six hundred seventeen".