2165023560 has 64 divisors (see below), whose sum is σ = 7422940800. Its totient is φ = 494862336.

The previous prime is 2165023537. The next prime is 2165023579. The reversal of 2165023560 is 653205612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287865 + ... + 1289544.

It is an arithmetic number, because the mean of its divisors is an integer number (115983450).

Almost surely, 2^2165023560 is an apocalyptic number.

2165023560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165023560 is an abundant number, since it is smaller than the sum of its proper divisors (5257917240).

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

2165023560 is a wasteful number, since it uses less digits than its factorization.

2165023560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577430 (or 2577426 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 2165023560 is about 46529.8136682278. The cubic root of 2165023560 is about 1293.6621614615.

The spelling of 2165023560 in words is "two billion, one hundred sixty-five million, twenty-three thousand, five hundred sixty".