2045519705 has 4 divisors (see below), whose sum is σ = 2454623652. Its totient is φ = 1636415760.

The previous prime is 2045519687. The next prime is 2045519711. The reversal of 2045519705 is 5079155402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 788037184 + 1257482521 = 28072^2 + 35461^2 .

It is not a de Polignac number, because 2045519705 - 2¹⁰ = 2045518681 is a prime.

It is a Duffinian 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, 204551966 + ... + 204551975.

It is an arithmetic number, because the mean of its divisors is an integer number (613655913).

Almost surely, 2^2045519705 is an apocalyptic number.

It is an amenable number.

2045519705 is a deficient number, since it is larger than the sum of its proper divisors (409103947).

2045519705 is an equidigital number, since it uses as much as digits as its factorization.

2045519705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409103946.

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 2045519705 is about 45227.4220468070. The cubic root of 2045519705 is about 1269.4079752471.

The spelling of 2045519705 in words is "two billion, forty-five million, five hundred nineteen thousand, seven hundred five".