549681949186945 has 8 divisors (see below), whose sum is σ = 659877114378600. Its totient is φ = 439573042446720.

The previous prime is 549681949186901. The next prime is 549681949186967.

549681949186945 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 227985870838401 + 321696078348544 = 15099201^2 + 17935888^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549681949186945 - 2¹⁹ = 549681948662657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21564598836 + ... + 21564624325.

It is an arithmetic number, because the mean of its divisors is an integer number (82484639297325).

Almost surely, 2^{549681949186945} is an apocalyptic number.

It is an amenable number.

549681949186945 is a deficient number, since it is larger than the sum of its proper divisors (110195165191655).

549681949186945 is a wasteful number, since it uses less digits than its factorization.

549681949186945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43129225715.

The product of its digits is 24186470400, while the sum is 88.

The spelling of 549681949186945 in words is "five hundred forty-nine trillion, six hundred eighty-one billion, nine hundred forty-nine million, one hundred eighty-six thousand, nine hundred forty-five".