2163665504 has 96 divisors (see below), whose sum is σ = 5719424256. Its totient is φ = 778129920.

The previous prime is 2163665503. The next prime is 2163665507. The reversal of 2163665504 is 4055663612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163665503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1742 + ... + 65805.

It is an arithmetic number, because the mean of its divisors is an integer number (59577336).

Almost surely, 2^2163665504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163665504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2859712128).

2163665504 is an abundant number, since it is smaller than the sum of its proper divisors (3555758752).

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

2163665504 is a wasteful number, since it uses less digits than its factorization.

2163665504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67588 (or 67580 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 2163665504 is about 46515.2179829354. The cubic root of 2163665504 is about 1293.3916127303.

The spelling of 2163665504 in words is "two billion, one hundred sixty-three million, six hundred sixty-five thousand, five hundred four".