51543147648 has 128 divisors (see below), whose sum is σ = 139633920000. Its totient is φ = 16841106432.

The previous prime is 51543147631. The next prime is 51543147703. The reversal of 51543147648 is 84674134515.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 51543147597 and 51543147606.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8311653 + ... + 8317851.

It is an arithmetic number, because the mean of its divisors is an integer number (1090890000).

Almost surely, 2^51543147648 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 51543147648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69816960000).

51543147648 is an abundant number, since it is smaller than the sum of its proper divisors (88090772352).

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

51543147648 is a wasteful number, since it uses less digits than its factorization.

51543147648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642 (or 6630 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 48.

The spelling of 51543147648 in words is "fifty-one billion, five hundred forty-three million, one hundred forty-seven thousand, six hundred forty-eight".