2051665159 has 8 divisors (see below), whose sum is σ = 2156273280. Its totient is φ = 1948340856.

The previous prime is 2051665153. The next prime is 2051665169. The reversal of 2051665159 is 9515661502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2051665159 - 2³ = 2051665151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051665151) 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 7 ways as a sum of consecutive naturals, for example, 317677 + ... + 324070.

It is an arithmetic number, because the mean of its divisors is an integer number (269534160).

Almost surely, 2^2051665159 is an apocalyptic number.

2051665159 is a deficient number, since it is larger than the sum of its proper divisors (104608121).

2051665159 is a wasteful number, since it uses less digits than its factorization.

2051665159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641909.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 2051665159 is about 45295.3105630152. The cubic root of 2051665159 is about 1270.6779522473.

The spelling of 2051665159 in words is "two billion, fifty-one million, six hundred sixty-five thousand, one hundred fifty-nine".