53971273728 has 192 divisors, whose sum is σ = 160432272000. Its totient is φ = 17927847936.

The previous prime is 53971273723. The next prime is 53971273751. The reversal of 53971273728 is 82737217935.

53971273728 is a `hidden beast` number, since 539 + 7 + 12 + 73 + 7 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (53971273723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17527293 + ... + 17530371.

It is an arithmetic number, because the mean of its divisors is an integer number (835584750).

Almost surely, 2^53971273728 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 53971273728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80216136000).

53971273728 is an abundant number, since it is smaller than the sum of its proper divisors (106460998272).

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

53971273728 is a wasteful number, since it uses less digits than its factorization.

53971273728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427 (or 3401 counting only the distinct ones).

The product of its digits is 4445280, while the sum is 54.

The spelling of 53971273728 in words is "fifty-three billion, nine hundred seventy-one million, two hundred seventy-three thousand, seven hundred twenty-eight".