55352031543440 has 160 divisors (see below), whose sum is σ = 134157282134400. Its totient is φ = 21220344074240.

The previous prime is 55352031543409. The next prime is 55352031543509. The reversal of 55352031543440 is 4434513025355.

It is a junction number, because it is equal to n+sod(n) for n = 55352031543391 and 55352031543400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288829571 + ... + 289021149.

It is an arithmetic number, because the mean of its divisors is an integer number (838483013340).

Almost surely, 2^{55352031543440} 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 55352031543440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67078641067200).

55352031543440 is an abundant number, since it is smaller than the sum of its proper divisors (78805250590960).

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

55352031543440 is a wasteful number, since it uses less digits than its factorization.

55352031543440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193185 (or 193179 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 44.

Adding to 55352031543440 its reverse (4434513025355), we get a palindrome (59786544568795).

The spelling of 55352031543440 in words is "fifty-five trillion, three hundred fifty-two billion, thirty-one million, five hundred forty-three thousand, four hundred forty".