9959955455 has 4 divisors (see below), whose sum is σ = 11951946552. Its totient is φ = 7967964360.

The previous prime is 9959955451. The next prime is 9959955469. The reversal of 9959955455 is 5545599599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5545599599 = 83 ⋅66814453.

It is not a de Polignac number, because 9959955455 - 2² = 9959955451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9959955391 and 9959955400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9959955451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995995541 + ... + 995995550.

It is an arithmetic number, because the mean of its divisors is an integer number (2987986638).

Almost surely, 2^9959955455 is an apocalyptic number.

9959955455 is a deficient number, since it is larger than the sum of its proper divisors (1991991097).

9959955455 is a wasteful number, since it uses less digits than its factorization.

9959955455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991991096.

The product of its digits is 82012500, while the sum is 65.

The square root of 9959955455 is about 99799.5764269568. The cubic root of 9959955455 is about 2151.5550642646. Note that the first 3 decimals are identical.

The spelling of 9959955455 in words is "nine billion, nine hundred fifty-nine million, nine hundred fifty-five thousand, four hundred fifty-five".