28306671677 has 2 divisors, whose sum is σ = 28306671678. Its totient is φ = 28306671676.

The previous prime is 28306671641. The next prime is 28306671709. The reversal of 28306671677 is 77617660382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27681971641 + 624700036 = 166379^2 + 24994^2 .

It is a cyclic number.

It is not a de Polignac number, because 28306671677 - 2²² = 28302477373 is a prime.

It is a super-2 number, since 2×28306671677² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28306671577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14153335838 + 14153335839.

It is an arithmetic number, because the mean of its divisors is an integer number (14153335839).

Almost surely, 2^28306671677 is an apocalyptic number.

It is an amenable number.

28306671677 is a deficient number, since it is larger than the sum of its proper divisors (1).

28306671677 is an equidigital number, since it uses as much as digits as its factorization.

28306671677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 28306671677 in words is "twenty-eight billion, three hundred six million, six hundred seventy-one thousand, six hundred seventy-seven".