28031080877 has 2 divisors, whose sum is σ = 28031080878. Its totient is φ = 28031080876.

The previous prime is 28031080871. The next prime is 28031080939. The reversal of 28031080877 is 77808013082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18566515081 + 9464565796 = 136259^2 + 97286^2 .

It is a cyclic number.

It is not a de Polignac number, because 28031080877 - 2¹⁸ = 28030818733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28031080871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015540438 + 14015540439.

It is an arithmetic number, because the mean of its divisors is an integer number (14015540439).

Almost surely, 2^28031080877 is an apocalyptic number.

It is an amenable number.

28031080877 is a deficient number, since it is larger than the sum of its proper divisors (1).

28031080877 is an equidigital number, since it uses as much as digits as its factorization.

28031080877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 28031080877 in words is "twenty-eight billion, thirty-one million, eighty thousand, eight hundred seventy-seven".