2161584504 has 24 divisors (see below), whose sum is σ = 5854291560. Its totient is φ = 720528144.

The previous prime is 2161584497. The next prime is 2161584541. The reversal of 2161584504 is 4054851612.

It is a happy number.

2161584504 is a `hidden beast` number, since 21 + 6 + 1 + 584 + 50 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15010932 + ... + 15011075.

It is an arithmetic number, because the mean of its divisors is an integer number (243928815).

Almost surely, 2^2161584504 is an apocalyptic number.

2161584504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2161584504 is an abundant number, since it is smaller than the sum of its proper divisors (3692707056).

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

2161584504 is a wasteful number, since it uses less digits than its factorization.

2161584504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30022019 (or 30022012 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 2161584504 is about 46492.8435783401. The cubic root of 2161584504 is about 1292.9768210558.

The spelling of 2161584504 in words is "two billion, one hundred sixty-one million, five hundred eighty-four thousand, five hundred four".