54161809 has 4 divisors (see below), whose sum is σ = 58328116. Its totient is φ = 49995504.

The previous prime is 54161797. The next prime is 54161827. The reversal of 54161809 is 90816145.

54161809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13712209 + 40449600 = 3703^2 + 6360^2 .

It is not a de Polignac number, because 54161809 - 2⁵ = 54161777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54161869) 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 3 ways as a sum of consecutive naturals, for example, 2083134 + ... + 2083159.

It is an arithmetic number, because the mean of its divisors is an integer number (14582029).

Almost surely, 2^54161809 is an apocalyptic number.

It is an amenable number.

54161809 is a deficient number, since it is larger than the sum of its proper divisors (4166307).

54161809 is a wasteful number, since it uses less digits than its factorization.

54161809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166306.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 54161809 is about 7359.4707010763. The cubic root of 54161809 is about 378.3534691856.

It can be divided in two parts, 5416 and 1809, that added together give a square (7225 = 85²).

The spelling of 54161809 in words is "fifty-four million, one hundred sixty-one thousand, eight hundred nine".