548340533981 has 2 divisors, whose sum is σ = 548340533982. Its totient is φ = 548340533980.

The previous prime is 548340533971. The next prime is 548340534011. The reversal of 548340533981 is 189335043845.

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., 538293679225 + 10046854756 = 733685^2 + 100234^2 .

It is a cyclic number.

It is not a de Polignac number, because 548340533981 - 2¹⁸ = 548340271837 is a prime.

It is a super-2 number, since 2×548340533981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (548340533921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274170266990 + 274170266991.

It is an arithmetic number, because the mean of its divisors is an integer number (274170266991).

Almost surely, 2^548340533981 is an apocalyptic number.

It is an amenable number.

548340533981 is a deficient number, since it is larger than the sum of its proper divisors (1).

548340533981 is an equidigital number, since it uses as much as digits as its factorization.

548340533981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 548340533981 in words is "five hundred forty-eight billion, three hundred forty million, five hundred thirty-three thousand, nine hundred eighty-one".