28861776101 has 2 divisors, whose sum is σ = 28861776102. Its totient is φ = 28861776100.

The previous prime is 28861775953. The next prime is 28861776109. The reversal of 28861776101 is 10167716882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24456268225 + 4405507876 = 156385^2 + 66374^2 .

It is a cyclic number.

It is not a de Polignac number, because 28861776101 - 2³⁰ = 27788034277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28861776109) 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, 14430888050 + 14430888051.

It is an arithmetic number, because the mean of its divisors is an integer number (14430888051).

Almost surely, 2^28861776101 is an apocalyptic number.

It is an amenable number.

28861776101 is a deficient number, since it is larger than the sum of its proper divisors (1).

28861776101 is an equidigital number, since it uses as much as digits as its factorization.

28861776101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 28861776101 in words is "twenty-eight billion, eight hundred sixty-one million, seven hundred seventy-six thousand, one hundred one".