53555855328 has 72 divisors (see below), whose sum is σ = 157551193800. Its totient is φ = 17236364544.

The previous prime is 53555855321. The next prime is 53555855329. The reversal of 53555855328 is 82355855535.

53555855328 is a `hidden beast` number, since 5 + 3 + 5 + 5 + 585 + 53 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53555855321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3197818 + ... + 3214521.

It is an arithmetic number, because the mean of its divisors is an integer number (2188211025).

Almost surely, 2^53555855328 is an apocalyptic number.

53555855328 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

53555855328 is an abundant number, since it is smaller than the sum of its proper divisors (103995338472).

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

53555855328 is a wasteful number, since it uses less digits than its factorization.

53555855328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412384 (or 6412373 counting only the distinct ones).

The product of its digits is 18000000, while the sum is 54.

The spelling of 53555855328 in words is "fifty-three billion, five hundred fifty-five million, eight hundred fifty-five thousand, three hundred twenty-eight".