47978123648 has 512 divisors, whose sum is σ = 130288435200. Its totient is φ = 17079828480.

The previous prime is 47978123647. The next prime is 47978123651. The reversal of 47978123648 is 84632187974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47978123647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 440166218 + ... + 440166326.

It is an arithmetic number, because the mean of its divisors is an integer number (254469600).

Almost surely, 2^47978123648 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 47978123648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65144217600).

47978123648 is an abundant number, since it is smaller than the sum of its proper divisors (82310311552).

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

47978123648 is a wasteful number, since it uses less digits than its factorization.

47978123648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 238 counting only the distinct ones).

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

The spelling of 47978123648 in words is "forty-seven billion, nine hundred seventy-eight million, one hundred twenty-three thousand, six hundred forty-eight".