2165783464 has 64 divisors (see below), whose sum is σ = 4430462400. Its totient is φ = 986605056.

The previous prime is 2165783447. The next prime is 2165783483. The reversal of 2165783464 is 4643875612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3367927 + ... + 3368569.

It is an arithmetic number, because the mean of its divisors is an integer number (69225975).

Almost surely, 2^2165783464 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 2165783464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2215231200).

2165783464 is an abundant number, since it is smaller than the sum of its proper divisors (2264678936).

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

2165783464 is a wasteful number, since it uses less digits than its factorization.

2165783464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1030 counting only the distinct ones).

The product of its digits is 967680, while the sum is 46.

The square root of 2165783464 is about 46537.9787270569. The cubic root of 2165783464 is about 1293.8134983918.

The spelling of 2165783464 in words is "two billion, one hundred sixty-five million, seven hundred eighty-three thousand, four hundred sixty-four".