54189416661 has 4 divisors (see below), whose sum is σ = 72252555552. Its totient is φ = 36126277772.

The previous prime is 54189416629. The next prime is 54189416663. The reversal of 54189416661 is 16661498145.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 54189416661 - 2⁵ = 54189416629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54189416663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9031569441 + ... + 9031569446.

It is an arithmetic number, because the mean of its divisors is an integer number (18063138888).

Almost surely, 2^54189416661 is an apocalyptic number.

It is an amenable number.

54189416661 is a deficient number, since it is larger than the sum of its proper divisors (18063138891).

54189416661 is a wasteful number, since it uses less digits than its factorization.

54189416661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18063138890.

The product of its digits is 1244160, while the sum is 51.

The spelling of 54189416661 in words is "fifty-four billion, one hundred eighty-nine million, four hundred sixteen thousand, six hundred sixty-one".