549218485658 has 4 divisors (see below), whose sum is σ = 823827728490. Its totient is φ = 274609242828.

The previous prime is 549218485657. The next prime is 549218485679. The reversal of 549218485658 is 856584812945.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 378647007649 + 170571478009 = 615343^2 + 413003^2 .

It is a junction number, because it is equal to n+sod(n) for n = 549218485594 and 549218485603.

It is not an unprimeable number, because it can be changed into a prime (549218485657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137304621413 + ... + 137304621416.

Almost surely, 2^549218485658 is an apocalyptic number.

549218485658 is a deficient number, since it is larger than the sum of its proper divisors (274609242832).

549218485658 is a wasteful number, since it uses less digits than its factorization.

549218485658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274609242831.

The product of its digits is 110592000, while the sum is 65.

The spelling of 549218485658 in words is "five hundred forty-nine billion, two hundred eighteen million, four hundred eighty-five thousand, six hundred fifty-eight".