55411681 has 8 divisors (see below), whose sum is σ = 61287464. Its totient is φ = 49766400.

The previous prime is 55411673. The next prime is 55411703. The reversal of 55411681 is 18611455.

55411681 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 4 ways, for example, as 518400 + 54893281 = 720^2 + 7409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 5-Lehmer number, since φ(55411681) divides (55411681-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 55411681 - 2³ = 55411673 is a prime.

It is a super-2 number, since 2×55411681² = 6140908782491522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55411661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57120 + ... + 58081.

It is an arithmetic number, because the mean of its divisors is an integer number (7660933).

Almost surely, 2^55411681 is an apocalyptic number.

It is an amenable number.

55411681 is a deficient number, since it is larger than the sum of its proper divisors (5875783).

55411681 is a wasteful number, since it uses less digits than its factorization.

55411681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115251.

The product of its digits is 4800, while the sum is 31.

The square root of 55411681 is about 7443.9022696433. The cubic root of 55411681 is about 381.2417389234.

The spelling of 55411681 in words is "fifty-five million, four hundred eleven thousand, six hundred eighty-one".