9955549550 has 12 divisors (see below), whose sum is σ = 18517322256. Its totient is φ = 3982219800.

The previous prime is 9955549477. The next prime is 9955549561. The reversal of 9955549550 is 559455599.

It is a super-2 number, since 2×9955549550² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99555446 + ... + 99555545.

It is an arithmetic number, because the mean of its divisors is an integer number (1543110188).

Almost surely, 2^9955549550 is an apocalyptic number.

9955549550 is a deficient number, since it is larger than the sum of its proper divisors (8561772706).

9955549550 is a wasteful number, since it uses less digits than its factorization.

9955549550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199111003 (or 199110998 counting only the distinct ones).

The product of its (nonzero) digits is 9112500, while the sum is 56.

The square root of 9955549550 is about 99777.5002192378. The cubic root of 9955549550 is about 2151.2377621308.

The spelling of 9955549550 in words is "nine billion, nine hundred fifty-five million, five hundred forty-nine thousand, five hundred fifty".