549755813889 has 12 divisors (see below), whose sum is σ = 794382536272. Its totient is φ = 366369658200.

The previous prime is 549755813881. The next prime is 549755813911. The reversal of 549755813889 is 988318557945.

549755813889 is a `hidden beast` number, since 5 + 4 + 9 + 7 + 5 + 581 + 38 + 8 + 9 = 666.

549755813889 is nontrivially palindromic in base 2 and base 8.

It is a Cunningham number, because it is equal to 2³⁹+1.

It is not a de Polignac number, because 549755813889 - 2³ = 549755813881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549755813881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (2) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11158867 + ... + 11208024.

It is a Proth number, since it is equal to 1 ⋅ 2³⁹ + 1 and 1 < 2³⁹.

Almost surely, 2^549755813889 is an apocalyptic number.

It is an amenable number.

549755813889 is a deficient number, since it is larger than the sum of its proper divisors (244626722383).

549755813889 is a wasteful number, since it uses less digits than its factorization.

549755813889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22369628 (or 22369625 counting only the distinct ones).

The product of its digits is 435456000, while the sum is 72.

The spelling of 549755813889 in words is "five hundred forty-nine billion, seven hundred fifty-five million, eight hundred thirteen thousand, eight hundred eighty-nine".