55381860726201 has 27 divisors (see below), whose sum is σ = 80324127558597. Its totient is φ = 36770422959000.

The previous prime is 55381860726109. The next prime is 55381860726217. The reversal of 55381860726201 is 10262706818355.

The square root of 55381860726201 is 7441899.

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

55381860726201 is a `hidden beast` number, since 5 + 5 + 3 + 8 + 1 + 8 + 6 + 0 + 7 + 2 + 620 + 1 = 666.

55381860726201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55381860726201 - 2³⁹ = 54832104912313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55381860727201) 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 26 ways as a sum of consecutive naturals, for example, 5603745006 + ... + 5603754888.

Almost surely, 2^{55381860726201} is an apocalyptic number.

55381860726201 is the 7441899-th square number.

55381860726201 is the 3720950-th centered octagonal number.

It is an amenable number.

55381860726201 is a deficient number, since it is larger than the sum of its proper divisors (24942266832396).

55381860726201 is an frugal number, since it uses more digits than its factorization.

55381860726201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20274 (or 10137 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 55381860726201 in words is "fifty-five trillion, three hundred eighty-one billion, eight hundred sixty million, seven hundred twenty-six thousand, two hundred one".