55320205140 has 36 divisors (see below), whose sum is σ = 167804622804. Its totient is φ = 14752054656.

The previous prime is 55320205063. The next prime is 55320205147. The reversal of 55320205140 is 4150202355.

It is a happy number.

55320205140 is a `hidden beast` number, since 553 + 2 + 0 + 20 + 51 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22532411664 + 32787793476 = 150108^2 + 181074^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55320205147) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 153667057 + ... + 153667416.

Almost surely, 2^55320205140 is an apocalyptic number.

It is an amenable number.

55320205140 is an abundant number, since it is smaller than the sum of its proper divisors (112484417664).

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

55320205140 is a wasteful number, since it uses less digits than its factorization.

55320205140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307334488 (or 307334483 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 55320205140 its reverse (4150202355), we get a palindrome (59470407495).

The spelling of 55320205140 in words is "fifty-five billion, three hundred twenty million, two hundred five thousand, one hundred forty".