445110840256781 has 2 divisors, whose sum is σ = 445110840256782. Its totient is φ = 445110840256780.

The previous prime is 445110840256777. The next prime is 445110840256883. The reversal of 445110840256781 is 187652048011544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415663775211556 + 29447065045225 = 20387834^2 + 5426515^2 .

It is a cyclic number.

It is not a de Polignac number, because 445110840256781 - 2² = 445110840256777 is a prime.

It is a super-2 number, since 2×445110840256781² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445110840256751) 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, 222555420128390 + 222555420128391.

It is an arithmetic number, because the mean of its divisors is an integer number (222555420128391).

Almost surely, 2^{445110840256781} is an apocalyptic number.

It is an amenable number.

445110840256781 is a deficient number, since it is larger than the sum of its proper divisors (1).

445110840256781 is an equidigital number, since it uses as much as digits as its factorization.

445110840256781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8601600, while the sum is 56.

The spelling of 445110840256781 in words is "four hundred forty-five trillion, one hundred ten billion, eight hundred forty million, two hundred fifty-six thousand, seven hundred eighty-one".