47991678336 has 640 divisors, whose sum is σ = 171184527360. Its totient is φ = 13058703360.

The previous prime is 47991678331. The next prime is 47991678377. The reversal of 47991678336 is 63387619974.

47991678336 is a `hidden beast` number, since 479 + 91 + 6 + 78 + 3 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47991678331) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 186737920 + ... + 186738176.

It is an arithmetic number, because the mean of its divisors is an integer number (267475824).

Almost surely, 2^47991678336 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 47991678336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85592263680).

47991678336 is an abundant number, since it is smaller than the sum of its proper divisors (123192849024).

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

47991678336 is a wasteful number, since it uses less digits than its factorization.

47991678336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 383 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 47991678336 in words is "forty-seven billion, nine hundred ninety-one million, six hundred seventy-eight thousand, three hundred thirty-six".