53443981328 has 20 divisors (see below), whose sum is σ = 105302761680. Its totient is φ = 26269075104.

The previous prime is 53443981291. The next prime is 53443981343. The reversal of 53443981328 is 82318934435.

It is a super-2 number, since 2×53443981328² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28306250 + ... + 28308137.

It is an arithmetic number, because the mean of its divisors is an integer number (5265138084).

Almost surely, 2^53443981328 is an apocalyptic number.

It is an amenable number.

53443981328 is a deficient number, since it is larger than the sum of its proper divisors (51858780352).

53443981328 is a wasteful number, since it uses less digits than its factorization.

53443981328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56614454 (or 56614448 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 50.

The spelling of 53443981328 in words is "fifty-three billion, four hundred forty-three million, nine hundred eighty-one thousand, three hundred twenty-eight".