547858405981 has 2 divisors, whose sum is σ = 547858405982. Its totient is φ = 547858405980.

The previous prime is 547858405909. The next prime is 547858406089. The reversal of 547858405981 is 189504858745.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313050321081 + 234808084900 = 559509^2 + 484570^2 .

It is a cyclic number.

It is not a de Polignac number, because 547858405981 - 2¹⁹ = 547857881693 is a prime.

It is a super-2 number, since 2×547858405981² (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 (547858405181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273929202990 + 273929202991.

It is an arithmetic number, because the mean of its divisors is an integer number (273929202991).

Almost surely, 2^547858405981 is an apocalyptic number.

It is an amenable number.

547858405981 is a deficient number, since it is larger than the sum of its proper divisors (1).

547858405981 is an equidigital number, since it uses as much as digits as its factorization.

547858405981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512000, while the sum is 64.

The spelling of 547858405981 in words is "five hundred forty-seven billion, eight hundred fifty-eight million, four hundred five thousand, nine hundred eighty-one".