2105616723 has 16 divisors (see below), whose sum is σ = 3210328320. Its totient is φ = 1202546016.

The previous prime is 2105616707. The next prime is 2105616749. The reversal of 2105616723 is 3276165012.

It is not a de Polignac number, because 2105616723 - 2⁴ = 2105616707 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2105616763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12708 + ... + 66126.

It is an arithmetic number, because the mean of its divisors is an integer number (200645520).

Almost surely, 2^2105616723 is an apocalyptic number.

2105616723 is a deficient number, since it is larger than the sum of its proper divisors (1104711597).

2105616723 is a wasteful number, since it uses less digits than its factorization.

2105616723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55306.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2105616723 is about 45886.9994987687. Note that the first 3 decimals coincide. The cubic root of 2105616723 is about 1281.7198404469.

It can be divided in two parts, 2105 and 616723, that added together give a triangular number (618828 = T₁₁₁₂).

The spelling of 2105616723 in words is "two billion, one hundred five million, six hundred sixteen thousand, seven hundred twenty-three".