2165158617 has 8 divisors (see below), whose sum is σ = 2893769760. Its totient is φ = 1439993280.

The previous prime is 2165158603. The next prime is 2165158621. The reversal of 2165158617 is 7168515612.

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

It is not a de Polignac number, because 2165158617 - 2⁴ = 2165158601 is a prime.

It is a super-3 number, since 3×2165158617³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2165158687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 859984 + ... + 862497.

It is an arithmetic number, because the mean of its divisors is an integer number (361721220).

Almost surely, 2^2165158617 is an apocalyptic number.

It is an amenable number.

2165158617 is a deficient number, since it is larger than the sum of its proper divisors (728611143).

2165158617 is a wasteful number, since it uses less digits than its factorization.

2165158617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722903.

The product of its digits is 100800, while the sum is 42.

The square root of 2165158617 is about 46531.2649408975. The cubic root of 2165158617 is about 1293.6890610145.

The spelling of 2165158617 in words is "two billion, one hundred sixty-five million, one hundred fifty-eight thousand, six hundred seventeen".