53440521344 has 128 divisors (see below), whose sum is σ = 128393683200. Its totient is φ = 21660401664.

The previous prime is 53440521301. The next prime is 53440521359. The reversal of 53440521344 is 44312504435.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1819544 + ... + 1848680.

It is an arithmetic number, because the mean of its divisors is an integer number (1003075650).

Almost surely, 2^53440521344 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 53440521344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64196841600).

53440521344 is an abundant number, since it is smaller than the sum of its proper divisors (74953161856).

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

53440521344 is a wasteful number, since it uses less digits than its factorization.

53440521344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29270 (or 29258 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 53440521344 in words is "fifty-three billion, four hundred forty million, five hundred twenty-one thousand, three hundred forty-four".