47045545820 has 144 divisors (see below), whose sum is σ = 126400901760. Its totient is φ = 14572164096.

The previous prime is 47045545747. The next prime is 47045545831. The reversal of 47045545820 is 2854554074.

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 47 ways as a sum of consecutive naturals, for example, 559496 + ... + 638064.

It is an arithmetic number, because the mean of its divisors is an integer number (877784040).

Almost surely, 2^47045545820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47045545820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63200450880).

47045545820 is an abundant number, since it is smaller than the sum of its proper divisors (79355355940).

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

47045545820 is a wasteful number, since it uses less digits than its factorization.

47045545820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78652 (or 78643 counting only the distinct ones).

The product of its (nonzero) digits is 896000, while the sum is 44.

The spelling of 47045545820 in words is "forty-seven billion, forty-five million, five hundred forty-five thousand, eight hundred twenty".