54064403665 has 4 divisors (see below), whose sum is σ = 64877284404. Its totient is φ = 43251522928.

The previous prime is 54064403641. The next prime is 54064403693. The reversal of 54064403665 is 56630446045.

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 13253535376 + 40810868289 = 115124^2 + 202017^2 .

It is a cyclic number.

It is not a de Polignac number, because 54064403665 - 2¹⁹ = 54063879377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5406440362 + ... + 5406440371.

It is an arithmetic number, because the mean of its divisors is an integer number (16219321101).

Almost surely, 2^54064403665 is an apocalyptic number.

It is an amenable number.

54064403665 is a deficient number, since it is larger than the sum of its proper divisors (10812880739).

54064403665 is a wasteful number, since it uses less digits than its factorization.

54064403665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10812880738.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 54064403665 in words is "fifty-four billion, sixty-four million, four hundred three thousand, six hundred sixty-five".