55664642005 has 8 divisors (see below), whose sum is σ = 76340080512. Its totient is φ = 38170040208.

The previous prime is 55664641997. The next prime is 55664642009. The reversal of 55664642005 is 50024646655.

It is a happy number.

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 55664642005 - 2³ = 55664641997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55664642009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795209137 + ... + 795209206.

It is an arithmetic number, because the mean of its divisors is an integer number (9542510064).

Almost surely, 2^55664642005 is an apocalyptic number.

It is an amenable number.

55664642005 is a deficient number, since it is larger than the sum of its proper divisors (20675438507).

55664642005 is a wasteful number, since it uses less digits than its factorization.

55664642005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590418355.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 55664642005 in words is "fifty-five billion, six hundred sixty-four million, six hundred forty-two thousand, five".