44861643920 has 20 divisors (see below), whose sum is σ = 104303322300. Its totient is φ = 17944657536.

The previous prime is 44861643913. The next prime is 44861643929. The reversal of 44861643920 is 2934616844.

44861643920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6101484544 + 38760159376 = 78112^2 + 196876^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (44861643929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280385195 + ... + 280385354.

It is an arithmetic number, because the mean of its divisors is an integer number (5215166115).

Almost surely, 2^44861643920 is an apocalyptic number.

44861643920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44861643920 is an abundant number, since it is smaller than the sum of its proper divisors (59441678380).

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

44861643920 is a wasteful number, since it uses less digits than its factorization.

44861643920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560770562 (or 560770556 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 44861643920 in words is "forty-four billion, eight hundred sixty-one million, six hundred forty-three thousand, nine hundred twenty".