55041382881 has 9 divisors (see below), whose sum is σ = 79505236369. Its totient is φ = 36693786036.

The previous prime is 55041382813. The next prime is 55041382897. The reversal of 55041382881 is 18828314055.

The square root of 55041382881 is 234609.

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

55041382881 is a `hidden beast` number, since 5 + 504 + 138 + 2 + 8 + 8 + 1 = 666.

55041382881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 55041382881 - 2¹⁷ = 55041251809 is a prime.

It is a super-2 number, since 2×55041382881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55041380881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 664726 + ... + 742928.

Almost surely, 2^55041382881 is an apocalyptic number.

55041382881 is the 234609-th square number.

55041382881 is the 117305-th centered octagonal number.

It is an amenable number.

55041382881 is a deficient number, since it is larger than the sum of its proper divisors (24463853488).

55041382881 is an frugal number, since it uses more digits than its factorization.

55041382881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156412 (or 78206 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 55041382881 in words is "fifty-five billion, forty-one million, three hundred eighty-two thousand, eight hundred eighty-one".