47985491840 has 256 divisors, whose sum is σ = 135248279040. Its totient is φ = 16049971200.

The previous prime is 47985491833. The next prime is 47985491843. The reversal of 47985491840 is 4819458974.

It is a self number, because there is not a number n which added to its sum of digits gives 47985491840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47985491843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31756685 + ... + 31758195.

It is an arithmetic number, because the mean of its divisors is an integer number (528313590).

Almost surely, 2^47985491840 is an apocalyptic number.

47985491840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47985491840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67624139520).

47985491840 is an abundant number, since it is smaller than the sum of its proper divisors (87262787200).

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

47985491840 is a wasteful number, since it uses less digits than its factorization.

47985491840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 47985491840 in words is "forty-seven billion, nine hundred eighty-five million, four hundred ninety-one thousand, eight hundred forty".