28107801049 has 2 divisors, whose sum is σ = 28107801050. Its totient is φ = 28107801048.

The previous prime is 28107801023. The next prime is 28107801079. The reversal of 28107801049 is 94010870182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25816455625 + 2291345424 = 160675^2 + 47868^2 .

It is a cyclic number.

It is not a de Polignac number, because 28107801049 - 2¹⁹ = 28107276761 is a prime.

It is not a weakly prime, because it can be changed into another prime (28107801079) 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, 14053900524 + 14053900525.

It is an arithmetic number, because the mean of its divisors is an integer number (14053900525).

Almost surely, 2^28107801049 is an apocalyptic number.

It is an amenable number.

28107801049 is a deficient number, since it is larger than the sum of its proper divisors (1).

28107801049 is an equidigital number, since it uses as much as digits as its factorization.

28107801049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 28107801049 in words is "twenty-eight billion, one hundred seven million, eight hundred one thousand, forty-nine".