2105611672 has 8 divisors (see below), whose sum is σ = 3948021900. Its totient is φ = 1052805832.

The previous prime is 2105611639. The next prime is 2105611679. The reversal of 2105611672 is 2761165012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105611679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131600722 + ... + 131600737.

Almost surely, 2^2105611672 is an apocalyptic number.

It is an amenable number.

2105611672 is a deficient number, since it is larger than the sum of its proper divisors (1842410228).

2105611672 is a wasteful number, since it uses less digits than its factorization.

2105611672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263201465 (or 263201461 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2105611672 is about 45886.9444613607. The cubic root of 2105611672 is about 1281.7188155734.

Adding to 2105611672 its reverse (2761165012), we get a palindrome (4866776684).

The spelling of 2105611672 in words is "two billion, one hundred five million, six hundred eleven thousand, six hundred seventy-two".