2045646919 has 4 divisors (see below), whose sum is σ = 2047763344. Its totient is φ = 2043530496.

The previous prime is 2045646901. The next prime is 2045646923. The reversal of 2045646919 is 9196465402.

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

It is a cyclic number.

It is not a de Polignac number, because 2045646919 - 2¹⁷ = 2045515847 is a prime.

It is a super-2 number, since 2×2045646919² = 8369342634428385122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045646929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056762 + ... + 1058695.

It is an arithmetic number, because the mean of its divisors is an integer number (511940836).

Almost surely, 2^2045646919 is an apocalyptic number.

2045646919 is a deficient number, since it is larger than the sum of its proper divisors (2116425).

2045646919 is an equidigital number, since it uses as much as digits as its factorization.

2045646919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116424.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 2045646919 is about 45228.8284062278. The cubic root of 2045646919 is about 1269.4342901763.

The spelling of 2045646919 in words is "two billion, forty-five million, six hundred forty-six thousand, nine hundred nineteen".