55355420509620 has 576 divisors, whose sum is σ = 207803330703360. Its totient is φ = 10869487641600.

The previous prime is 55355420509601. The next prime is 55355420509643. The reversal of 55355420509620 is 2690502455355.

It is a congruent number.

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 191 ways as a sum of consecutive naturals, for example, 43451515 + ... + 44707325.

It is an arithmetic number, because the mean of its divisors is an integer number (360769671360).

Almost surely, 2^{55355420509620} 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 55355420509620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103901665351680).

55355420509620 is an abundant number, since it is smaller than the sum of its proper divisors (152447910193740).

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

55355420509620 is a wasteful number, since it uses less digits than its factorization.

55355420509620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255924 (or 1255915 counting only the distinct ones).

The product of its (nonzero) digits is 8100000, while the sum is 51.

The spelling of 55355420509620 in words is "fifty-five trillion, three hundred fifty-five billion, four hundred twenty million, five hundred nine thousand, six hundred twenty".