2156163345 has 48 divisors (see below), whose sum is σ = 4386720000. Its totient is φ = 959029632.

The previous prime is 2156163341. The next prime is 2156163349. The reversal of 2156163345 is 5433616512.

2156163345 is a `hidden beast` number, since 2 + 1 + 5 + 616 + 3 + 34 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2156163341) and next prime (2156163349).

It is not a de Polignac number, because 2156163345 - 2² = 2156163341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2156163341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80845 + ... + 104154.

It is an arithmetic number, because the mean of its divisors is an integer number (91390000).

Almost surely, 2^2156163345 is an apocalyptic number.

It is an amenable number.

2156163345 is an abundant number, since it is smaller than the sum of its proper divisors (2230556655).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156163345 is a wasteful number, since it uses less digits than its factorization.

2156163345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185054 (or 185051 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 2156163345 is about 46434.5059734676. The cubic root of 2156163345 is about 1291.8950064766.

Adding to 2156163345 its reverse (5433616512), we get a palindrome (7589779857).

The spelling of 2156163345 in words is "two billion, one hundred fifty-six million, one hundred sixty-three thousand, three hundred forty-five".