55255718029561 has 9 divisors (see below), whose sum is σ = 64277120277999. Its totient is φ = 47361999424824.

The previous prime is 55255718029513. The next prime is 55255718029643. The reversal of 55255718029561 is 16592081755255.

It is a happy number.

The square root of 55255718029561 is 7433419.

It is a perfect power (a square), and thus also a powerful number.

55255718029561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 16469677141225 + 38786040888336 = 4058285^2 + 6227844^2 .

It is not a de Polignac number, because 55255718029561 - 2¹⁷ = 55255717898489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55255718029561.

It is not an unprimeable number, because it can be changed into a prime (55255718029361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51502975 + ... + 52564891.

It is an arithmetic number, because the mean of its divisors is an integer number (7141902253111).

Almost surely, 2^{55255718029561} is an apocalyptic number.

55255718029561 is the 7433419-th square number.

55255718029561 is the 3716710-th centered octagonal number.

It is an amenable number.

55255718029561 is a deficient number, since it is larger than the sum of its proper divisors (9021402248438).

55255718029561 is an frugal number, since it uses more digits than its factorization.

55255718029561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123848 (or 1061924 counting only the distinct ones).

The product of its (nonzero) digits is 37800000, while the sum is 61.

The spelling of 55255718029561 in words is "fifty-five trillion, two hundred fifty-five billion, seven hundred eighteen million, twenty-nine thousand, five hundred sixty-one".