2045478865 has 8 divisors (see below), whose sum is σ = 2455363008. Its totient is φ = 1635857520.

The previous prime is 2045478833. The next prime is 2045478899. The reversal of 2045478865 is 5688745402.

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

It is not a de Polignac number, because 2045478865 - 2⁵ = 2045478833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48147 + ... + 80056.

It is an arithmetic number, because the mean of its divisors is an integer number (306920376).

Almost surely, 2^2045478865 is an apocalyptic number.

It is an amenable number.

2045478865 is a deficient number, since it is larger than the sum of its proper divisors (409884143).

2045478865 is a wasteful number, since it uses less digits than its factorization.

2045478865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131399.

The product of its (nonzero) digits is 2150400, while the sum is 49.

The square root of 2045478865 is about 45226.9705485565. The cubic root of 2045478865 is about 1269.3995270327.

The spelling of 2045478865 in words is "two billion, forty-five million, four hundred seventy-eight thousand, eight hundred sixty-five".