47721394688 has 320 divisors, whose sum is σ = 119234332800. Its totient is φ = 18791792640.

The previous prime is 47721394667. The next prime is 47721394697. The reversal of 47721394688 is 88649312774.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67307678 + ... + 67308386.

It is an arithmetic number, because the mean of its divisors is an integer number (372607290).

Almost surely, 2^47721394688 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 47721394688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59617166400).

47721394688 is an abundant number, since it is smaller than the sum of its proper divisors (71512938112).

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

47721394688 is a wasteful number, since it uses less digits than its factorization.

47721394688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 795 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 59.

The spelling of 47721394688 in words is "forty-seven billion, seven hundred twenty-one million, three hundred ninety-four thousand, six hundred eighty-eight".