9951065165 has 4 divisors (see below), whose sum is σ = 11941278204. Its totient is φ = 7960852128.

The previous prime is 9951065123. The next prime is 9951065213. The reversal of 9951065165 is 5615601599.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4757412676 + 5193652489 = 68974^2 + 72067^2 .

It is a cyclic number.

It is not a de Polignac number, because 9951065165 - 2⁶ = 9951065101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 995106512 + ... + 995106521.

It is an arithmetic number, because the mean of its divisors is an integer number (2985319551).

Almost surely, 2^9951065165 is an apocalyptic number.

It is an amenable number.

9951065165 is a deficient number, since it is larger than the sum of its proper divisors (1990213039).

9951065165 is a wasteful number, since it uses less digits than its factorization.

9951065165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990213038.

The product of its (nonzero) digits is 364500, while the sum is 47.

The square root of 9951065165 is about 99755.0257631163. The cubic root of 9951065165 is about 2150.9147119187.

The spelling of 9951065165 in words is "nine billion, nine hundred fifty-one million, sixty-five thousand, one hundred sixty-five".