2105708545 has 8 divisors (see below), whose sum is σ = 2588481000. Its totient is φ = 1643479680.

The previous prime is 2105708513. The next prime is 2105708639. The reversal of 2105708545 is 5458075012.

It is a Cunningham number, because it is equal to 45888²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 2105708544 = 1^2 + 45888^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2105708545 - 2⁵ = 2105708513 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5135670 + ... + 5136079.

It is an arithmetic number, because the mean of its divisors is an integer number (323560125).

Almost surely, 2^2105708545 is an apocalyptic number.

It is an amenable number.

2105708545 is a deficient number, since it is larger than the sum of its proper divisors (482772455).

2105708545 is a wasteful number, since it uses less digits than its factorization.

2105708545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271795.

The product of its (nonzero) digits is 56000, while the sum is 37.

The square root of 2105708545 is about 45888.0000108961. Note that the first 4 decimals coincide. The cubic root of 2105708545 is about 1281.7384713096.

The spelling of 2105708545 in words is "two billion, one hundred five million, seven hundred eight thousand, five hundred forty-five".