53644705980 has 144 divisors (see below), whose sum is σ = 159803903616. Its totient is φ = 13443240960.

The previous prime is 53644705979. The next prime is 53644705991. The reversal of 53644705980 is 8950744635.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13644615 + ... + 13648545.

Almost surely, 2^53644705980 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 53644705980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79901951808).

53644705980 is an abundant number, since it is smaller than the sum of its proper divisors (106159197636).

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

53644705980 is a wasteful number, since it uses less digits than its factorization.

53644705980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4764 (or 4745 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 53644705980 in words is "fifty-three billion, six hundred forty-four million, seven hundred five thousand, nine hundred eighty".