28056107801 has 2 divisors, whose sum is σ = 28056107802. Its totient is φ = 28056107800.

The previous prime is 28056107791. The next prime is 28056107803. The reversal of 28056107801 is 10870165082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23000755600 + 5055352201 = 151660^2 + 71101^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28056107801 is a prime.

It is a Sophie Germain prime.

Together with 28056107803, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28056107803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028053900 + 14028053901.

It is an arithmetic number, because the mean of its divisors is an integer number (14028053901).

Almost surely, 2^28056107801 is an apocalyptic number.

It is an amenable number.

28056107801 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056107801 is an equidigital number, since it uses as much as digits as its factorization.

28056107801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The spelling of 28056107801 in words is "twenty-eight billion, fifty-six million, one hundred seven thousand, eight hundred one".