9955551111 has 32 divisors (see below), whose sum is σ = 14780683008. Its totient is φ = 5909130240.

The previous prime is 9955551107. The next prime is 9955551119. The reversal of 9955551111 is 1111555599.

9955551111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9955551111 - 2² = 9955551107 is a prime.

It is a super-2 number, since 2×9955551111² (a number of 21 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9955551119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1021815 + ... + 1031511.

It is an arithmetic number, because the mean of its divisors is an integer number (461896344).

Almost surely, 2^9955551111 is an apocalyptic number.

9955551111 is a deficient number, since it is larger than the sum of its proper divisors (4825131897).

9955551111 is a wasteful number, since it uses less digits than its factorization.

9955551111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10351.

The product of its digits is 50625, while the sum is 42.

The square root of 9955551111 is about 99777.5080416423. The cubic root of 9955551111 is about 2151.2378745666.

The spelling of 9955551111 in words is "nine billion, nine hundred fifty-five million, five hundred fifty-one thousand, one hundred eleven".