2045571680 has 24 divisors (see below), whose sum is σ = 4832663472. Its totient is φ = 818228608.

The previous prime is 2045571667. The next prime is 2045571701. The reversal of 2045571680 is 861755402.

It is a congruent number.

It is an unprimeable number.

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, 6392252 + ... + 6392571.

It is an arithmetic number, because the mean of its divisors is an integer number (201360978).

Almost surely, 2^2045571680 is an apocalyptic number.

2045571680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2045571680 is an abundant number, since it is smaller than the sum of its proper divisors (2787091792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2045571680 is a wasteful number, since it uses less digits than its factorization.

2045571680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12784838 (or 12784830 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 2045571680 is about 45227.9966392499. The cubic root of 2045571680 is about 1269.4187266991.

The spelling of 2045571680 in words is "two billion, forty-five million, five hundred seventy-one thousand, six hundred eighty".