2128156617 has 8 divisors (see below), whose sum is σ = 2986886560. Its totient is φ = 1344098880.

The previous prime is 2128156607. The next prime is 2128156633. The reversal of 2128156617 is 7166518212.

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

It is not a de Polignac number, because 2128156617 - 2⁸ = 2128156361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2128156607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18667984 + ... + 18668097.

It is an arithmetic number, because the mean of its divisors is an integer number (373360820).

Almost surely, 2^2128156617 is an apocalyptic number.

It is an amenable number.

2128156617 is a deficient number, since it is larger than the sum of its proper divisors (858729943).

2128156617 is a wasteful number, since it uses less digits than its factorization.

2128156617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37336103.

The product of its digits is 40320, while the sum is 39.

The square root of 2128156617 is about 46131.9478994763. The cubic root of 2128156617 is about 1286.2770726262.

The spelling of 2128156617 in words is "two billion, one hundred twenty-eight million, one hundred fifty-six thousand, six hundred seventeen".