10021540459789 has 2 divisors, whose sum is σ = 10021540459790. Its totient is φ = 10021540459788.

The previous prime is 10021540459771. The next prime is 10021540459811. The reversal of 10021540459789 is 98795404512001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9393967541764 + 627572918025 = 3064958^2 + 792195^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021540459789 - 2⁵ = 10021540459757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021540159789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010770229894 + 5010770229895.

It is an arithmetic number, because the mean of its divisors is an integer number (5010770229895).

Almost surely, 2^{10021540459789} is an apocalyptic number.

It is an amenable number.

10021540459789 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021540459789 is an equidigital number, since it uses as much as digits as its factorization.

10021540459789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 10021540459789 in words is "ten trillion, twenty-one billion, five hundred forty million, four hundred fifty-nine thousand, seven hundred eighty-nine".