55217053685 has 4 divisors (see below), whose sum is σ = 66260464428. Its totient is φ = 44173642944.

The previous prime is 55217053673. The next prime is 55217053721. The reversal of 55217053685 is 58635071255.

It is a happy number.

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 18834543121 + 36382510564 = 137239^2 + 190742^2 .

It is a cyclic number.

It is not a de Polignac number, because 55217053685 - 2⁶ = 55217053621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5521705364 + ... + 5521705373.

It is an arithmetic number, because the mean of its divisors is an integer number (16565116107).

Almost surely, 2^55217053685 is an apocalyptic number.

It is an amenable number.

55217053685 is a deficient number, since it is larger than the sum of its proper divisors (11043410743).

55217053685 is a wasteful number, since it uses less digits than its factorization.

55217053685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11043410742.

The product of its (nonzero) digits is 1260000, while the sum is 47.

The spelling of 55217053685 in words is "fifty-five billion, two hundred seventeen million, fifty-three thousand, six hundred eighty-five".