28376685677 has 2 divisors, whose sum is σ = 28376685678. Its totient is φ = 28376685676.

The previous prime is 28376685671. The next prime is 28376685691. The reversal of 28376685677 is 77658667382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27938788201 + 437897476 = 167149^2 + 20926^2 .

It is a cyclic number.

It is not a de Polignac number, because 28376685677 - 2⁴ = 28376685661 is a prime.

It is a super-2 number, since 2×28376685677² (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 (28376685671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14188342838 + 14188342839.

It is an arithmetic number, because the mean of its divisors is an integer number (14188342839).

Almost surely, 2^28376685677 is an apocalyptic number.

It is an amenable number.

28376685677 is a deficient number, since it is larger than the sum of its proper divisors (1).

28376685677 is an equidigital number, since it uses as much as digits as its factorization.

28376685677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142248960, while the sum is 65.

The spelling of 28376685677 in words is "twenty-eight billion, three hundred seventy-six million, six hundred eighty-five thousand, six hundred seventy-seven".