2045439919 has 16 divisors (see below), whose sum is σ = 2145592800. Its totient is φ = 1947387904.

The previous prime is 2045439911. The next prime is 2045439931. The reversal of 2045439919 is 9199345402.

It is a cyclic number.

It is not a de Polignac number, because 2045439919 - 2³ = 2045439911 is a prime.

It is a super-2 number, since 2×2045439919² = 8367648924477453122, 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 (2045439911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204479 + ... + 1206175.

It is an arithmetic number, because the mean of its divisors is an integer number (134099550).

Almost surely, 2^2045439919 is an apocalyptic number.

2045439919 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2045439919 is a deficient number, since it is larger than the sum of its proper divisors (100152881).

2045439919 is a wasteful number, since it uses less digits than its factorization.

2045439919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 2045439919 is about 45226.5399848363. The cubic root of 2045439919 is about 1269.3914705089.

The spelling of 2045439919 in words is "two billion, forty-five million, four hundred thirty-nine thousand, nine hundred nineteen".