545050259681 has 2 divisors, whose sum is σ = 545050259682. Its totient is φ = 545050259680.

The previous prime is 545050259651. The next prime is 545050259731. The reversal of 545050259681 is 186952050545.

It is a happy number.

It is an a-pointer prime, because the next prime (545050259731) can be obtained adding 545050259681 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480491580625 + 64558679056 = 693175^2 + 254084^2 .

It is a cyclic number.

It is not a de Polignac number, because 545050259681 - 2⁶ = 545050259617 is a prime.

It is a super-2 number, since 2×545050259681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (545050259651) 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, 272525129840 + 272525129841.

It is an arithmetic number, because the mean of its divisors is an integer number (272525129841).

Almost surely, 2^545050259681 is an apocalyptic number.

It is an amenable number.

545050259681 is a deficient number, since it is larger than the sum of its proper divisors (1).

545050259681 is an equidigital number, since it uses as much as digits as its factorization.

545050259681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160000, while the sum is 50.

The spelling of 545050259681 in words is "five hundred forty-five billion, fifty million, two hundred fifty-nine thousand, six hundred eighty-one".