53643233280 has 768 divisors, whose sum is σ = 218386022400. Its totient is φ = 10935336960.

The previous prime is 53643233269. The next prime is 53643233297. The reversal of 53643233280 is 8233234635.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86660811 + ... + 86661429.

It is an arithmetic number, because the mean of its divisors is an integer number (284356800).

Almost surely, 2^53643233280 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 53643233280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109193011200).

53643233280 is an abundant number, since it is smaller than the sum of its proper divisors (164742789120).

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

53643233280 is a wasteful number, since it uses less digits than its factorization.

53643233280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 53643233280 in words is "fifty-three billion, six hundred forty-three million, two hundred thirty-three thousand, two hundred eighty".