549509955550 has 12 divisors (see below), whose sum is σ = 1022088517416. Its totient is φ = 219803982200.

The previous prime is 549509955539. The next prime is 549509955559. The reversal of 549509955550 is 55559905945.

It is a happy number.

It is a super-2 number, since 2×549509955550² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549509955559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5495099506 + ... + 5495099605.

It is an arithmetic number, because the mean of its divisors is an integer number (85174043118).

Almost surely, 2^549509955550 is an apocalyptic number.

549509955550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

549509955550 is a deficient number, since it is larger than the sum of its proper divisors (472578561866).

549509955550 is a wasteful number, since it uses less digits than its factorization.

549509955550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990199123 (or 10990199118 counting only the distinct ones).

The product of its (nonzero) digits is 45562500, while the sum is 61.

The spelling of 549509955550 in words is "five hundred forty-nine billion, five hundred nine million, nine hundred fifty-five thousand, five hundred fifty".