2165996502 has 48 divisors (see below), whose sum is σ = 4891868592. Its totient is φ = 691986240.

The previous prime is 2165996501. The next prime is 2165996531. The reversal of 2165996502 is 2056995612.

It is a happy number.

2165996502 is a `hidden beast` number, since 2 + 1 + 6 + 59 + 96 + 502 = 666.

2165996502 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165996501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20352 + ... + 68892.

It is an arithmetic number, because the mean of its divisors is an integer number (101913929).

Almost surely, 2^2165996502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2165996502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2445934296).

2165996502 is an abundant number, since it is smaller than the sum of its proper divisors (2725872090).

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

2165996502 is a wasteful number, since it uses less digits than its factorization.

2165996502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48653 (or 48650 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 2165996502 is about 46540.2675325357. The cubic root of 2165996502 is about 1293.8559191305.

The spelling of 2165996502 in words is "two billion, one hundred sixty-five million, nine hundred ninety-six thousand, five hundred two".