53442144520 has 32 divisors (see below), whose sum is σ = 127318051800. Its totient is φ = 20119395328.

The previous prime is 53442144473. The next prime is 53442144521. The reversal of 53442144520 is 2544124435.

It can be written as a sum of positive squares in 4 ways, for example, as 32928457444 + 20513687076 = 181462^2 + 143226^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (53442144521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39295015 + ... + 39296374.

Almost surely, 2^53442144520 is an apocalyptic number.

It is an amenable number.

53442144520 is an abundant number, since it is smaller than the sum of its proper divisors (73875907280).

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

53442144520 is a wasteful number, since it uses less digits than its factorization.

53442144520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78591417 (or 78591413 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 53442144520 its reverse (2544124435), we get a palindrome (55986268955).

The spelling of 53442144520 in words is "fifty-three billion, four hundred forty-two million, one hundred forty-four thousand, five hundred twenty".