549803892919381 has 2 divisors, whose sum is σ = 549803892919382. Its totient is φ = 549803892919380.

The previous prime is 549803892919247. The next prime is 549803892919397. The reversal of 549803892919381 is 183919298308945.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543645881926225 + 6158010993156 = 23316215^2 + 2481534^2 .

It is a cyclic number.

It is not a de Polignac number, because 549803892919381 - 2⁹ = 549803892918869 is a prime.

It is a super-2 number, since 2×549803892919381² (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 (549803892619381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274901946459690 + 274901946459691.

It is an arithmetic number, because the mean of its divisors is an integer number (274901946459691).

Almost surely, 2^{549803892919381} is an apocalyptic number.

It is an amenable number.

549803892919381 is a deficient number, since it is larger than the sum of its proper divisors (1).

549803892919381 is an equidigital number, since it uses as much as digits as its factorization.

549803892919381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209323520, while the sum is 79.

The spelling of 549803892919381 in words is "five hundred forty-nine trillion, eight hundred three billion, eight hundred ninety-two million, nine hundred nineteen thousand, three hundred eighty-one".