47547287820 has 96 divisors (see below), whose sum is σ = 148102617600. Its totient is φ = 12664043712.

The previous prime is 47547287791. The next prime is 47547287857. The reversal of 47547287820 is 2878274574.

47547287820 is a `hidden beast` number, since 4 + 7 + 547 + 2 + 8 + 78 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400587 + ... + 505533.

It is an arithmetic number, because the mean of its divisors is an integer number (1542735600).

Almost surely, 2^47547287820 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 47547287820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74051308800).

47547287820 is an abundant number, since it is smaller than the sum of its proper divisors (100555329780).

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

47547287820 is a wasteful number, since it uses less digits than its factorization.

47547287820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105804 (or 105796 counting only the distinct ones).

The product of its (nonzero) digits is 7024640, while the sum is 54.

The spelling of 47547287820 in words is "forty-seven billion, five hundred forty-seven million, two hundred eighty-seven thousand, eight hundred twenty".