28604612077 has 2 divisors, whose sum is σ = 28604612078. Its totient is φ = 28604612076.

The previous prime is 28604612059. The next prime is 28604612117. The reversal of 28604612077 is 77021640682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27855276201 + 749335876 = 166899^2 + 27374^2 .

It is a cyclic number.

It is not a de Polignac number, because 28604612077 - 2⁷ = 28604611949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28604613077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14302306038 + 14302306039.

It is an arithmetic number, because the mean of its divisors is an integer number (14302306039).

Almost surely, 2^28604612077 is an apocalyptic number.

It is an amenable number.

28604612077 is a deficient number, since it is larger than the sum of its proper divisors (1).

28604612077 is an equidigital number, since it uses as much as digits as its factorization.

28604612077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 28604612077 in words is "twenty-eight billion, six hundred four million, six hundred twelve thousand, seventy-seven".