9965996155 has 4 divisors (see below), whose sum is σ = 11959195392. Its totient is φ = 7972796920.

The previous prime is 9965996149. The next prime is 9965996233. The reversal of 9965996155 is 5516995699.

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

It is not a de Polignac number, because 9965996155 - 2⁵ = 9965996123 is a prime.

It is a super-2 number, since 2×9965996155² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996599611 + ... + 996599620.

It is an arithmetic number, because the mean of its divisors is an integer number (2989798848).

Almost surely, 2^9965996155 is an apocalyptic number.

9965996155 is a deficient number, since it is larger than the sum of its proper divisors (1993199237).

9965996155 is a wasteful number, since it uses less digits than its factorization.

9965996155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993199236.

The product of its digits is 29524500, while the sum is 64.

The square root of 9965996155 is about 99829.8359960588. The cubic root of 9965996155 is about 2151.9899481382.

The spelling of 9965996155 in words is "nine billion, nine hundred sixty-five million, nine hundred ninety-six thousand, one hundred fifty-five".