53555521152 has 128 divisors (see below), whose sum is σ = 162733933440. Its totient is φ = 15287021568.

The previous prime is 53555521109. The next prime is 53555521153. The reversal of 53555521152 is 25112555535.

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

It is a self number, because there is not a number n which added to its sum of digits gives 53555521152.

It is not an unprimeable number, because it can be changed into a prime (53555521153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2993578 + ... + 3011414.

It is an arithmetic number, because the mean of its divisors is an integer number (1271358855).

Almost surely, 2^53555521152 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 53555521152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81366966720).

53555521152 is an abundant number, since it is smaller than the sum of its proper divisors (109178412288).

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

53555521152 is a wasteful number, since it uses less digits than its factorization.

53555521152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18978 (or 18966 counting only the distinct ones).

The product of its digits is 187500, while the sum is 39.

The spelling of 53555521152 in words is "fifty-three billion, five hundred fifty-five million, five hundred twenty-one thousand, one hundred fifty-two".