549813301778 has 16 divisors (see below), whose sum is σ = 890719502400. Its totient is φ = 253028684496.

The previous prime is 549813301777. The next prime is 549813301789. The reversal of 549813301778 is 877103318945.

It is a happy number.

It is a super-2 number, since 2×549813301778² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (549813301777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30461678 + ... + 30479721.

It is an arithmetic number, because the mean of its divisors is an integer number (55669968900).

Almost surely, 2^549813301778 is an apocalyptic number.

549813301778 is a deficient number, since it is larger than the sum of its proper divisors (340906200622).

549813301778 is a wasteful number, since it uses less digits than its factorization.

549813301778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60941761.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 549813301778 in words is "five hundred forty-nine billion, eight hundred thirteen million, three hundred one thousand, seven hundred seventy-eight".