54166105681 has 8 divisors (see below), whose sum is σ = 54782649000. Its totient is φ = 53549738880.

The previous prime is 54166105667. The next prime is 54166105703. The reversal of 54166105681 is 18650166145.

It can be written as a sum of positive squares in 4 ways, for example, as 268304400 + 53897801281 = 16380^2 + 232159^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 54166105681 - 2¹⁵ = 54166072913 is a prime.

It is a super-2 number, since 2×54166105681² (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 (54166105481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631551 + ... + 712171.

It is an arithmetic number, because the mean of its divisors is an integer number (6847831125).

Almost surely, 2^54166105681 is an apocalyptic number.

It is an amenable number.

54166105681 is a deficient number, since it is larger than the sum of its proper divisors (616543319).

54166105681 is an equidigital number, since it uses as much as digits as its factorization.

54166105681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88259.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 54166105681 in words is "fifty-four billion, one hundred sixty-six million, one hundred five thousand, six hundred eighty-one".