55161666116659 has 4 divisors (see below), whose sum is σ = 55162146696120. Its totient is φ = 55161185537200.

The previous prime is 55161666116657. The next prime is 55161666116663. The reversal of 55161666116659 is 95661166616155.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55161666116659 - 2¹ = 55161666116657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55161666116659.

It is not an unprimeable number, because it can be changed into a prime (55161666116657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240117517 + ... + 240347134.

It is an arithmetic number, because the mean of its divisors is an integer number (13790536674030).

Almost surely, 2^{55161666116659} is an apocalyptic number.

55161666116659 is a deficient number, since it is larger than the sum of its proper divisors (480579461).

55161666116659 is a wasteful number, since it uses less digits than its factorization.

55161666116659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480579460.

The product of its digits is 52488000, while the sum is 64.

The spelling of 55161666116659 in words is "fifty-five trillion, one hundred sixty-one billion, six hundred sixty-six million, one hundred sixteen thousand, six hundred fifty-nine".