2181697596 has 36 divisors (see below), whose sum is σ = 5939066952. Its totient is φ = 671291424.

The previous prime is 2181697577. The next prime is 2181697603. The reversal of 2181697596 is 6957961812.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2330406 + ... + 2331341.

It is an arithmetic number, because the mean of its divisors is an integer number (164974082).

Almost surely, 2^2181697596 is an apocalyptic number.

2181697596 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2181697596 is an abundant number, since it is smaller than the sum of its proper divisors (3757369356).

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

2181697596 is a wasteful number, since it uses less digits than its factorization.

2181697596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661770 (or 4661765 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 2181697596 is about 46708.6458377890. The cubic root of 2181697596 is about 1296.9747396662.

The spelling of 2181697596 in words is "two billion, one hundred eighty-one million, six hundred ninety-seven thousand, five hundred ninety-six".