53604944640 has 648 divisors, whose sum is σ = 207828221328. Its totient is φ = 13168189440.

The previous prime is 53604944609. The next prime is 53604944677. The reversal of 53604944640 is 4644940635.

It is a tau number, because it is divible by the number of its divisors (648).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 109174795 + ... + 109175285.

Almost surely, 2^53604944640 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 53604944640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103914110664).

53604944640 is an abundant number, since it is smaller than the sum of its proper divisors (154223276688).

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

53604944640 is an frugal number, since it uses more digits than its factorization.

53604944640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 53604944640 in words is "fifty-three billion, six hundred four million, nine hundred forty-four thousand, six hundred forty".