54166165689 has 4 divisors (see below), whose sum is σ = 72221554256. Its totient is φ = 36110777124.

The previous prime is 54166165657. The next prime is 54166165699. The reversal of 54166165689 is 98656166145.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 54166165689 - 2⁵ = 54166165657 is a prime.

It is a super-3 number, since 3×54166165689³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54166165619) 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 3 ways as a sum of consecutive naturals, for example, 9027694279 + ... + 9027694284.

It is an arithmetic number, because the mean of its divisors is an integer number (18055388564).

Almost surely, 2^54166165689 is an apocalyptic number.

It is an amenable number.

54166165689 is a deficient number, since it is larger than the sum of its proper divisors (18055388567).

54166165689 is a wasteful number, since it uses less digits than its factorization.

54166165689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18055388566.

The product of its digits is 9331200, while the sum is 57.

The spelling of 54166165689 in words is "fifty-four billion, one hundred sixty-six million, one hundred sixty-five thousand, six hundred eighty-nine".