2161739004 has 12 divisors (see below), whose sum is σ = 5044057704. Its totient is φ = 720579664.

The previous prime is 2161738991. The next prime is 2161739051. The reversal of 2161739004 is 4009371612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90072447 + ... + 90072470.

It is an arithmetic number, because the mean of its divisors is an integer number (420338142).

Almost surely, 2^2161739004 is an apocalyptic number.

It is an amenable number.

2161739004 is an abundant number, since it is smaller than the sum of its proper divisors (2882318700).

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

2161739004 is a wasteful number, since it uses less digits than its factorization.

2161739004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180144924 (or 180144922 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 2161739004 is about 46494.5050946883. The cubic root of 2161739004 is about 1293.0076256437.

The spelling of 2161739004 in words is "two billion, one hundred sixty-one million, seven hundred thirty-nine thousand, four".