55685533574785 has 4 divisors (see below), whose sum is σ = 66822640289748. Its totient is φ = 44548426859824.

The previous prime is 55685533574747. The next prime is 55685533574809. The reversal of 55685533574785 is 58747533558655.

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 35593919652096 + 20091613922689 = 5966064^2 + 4482367^2 .

It is a cyclic number.

It is not a de Polignac number, because 55685533574785 - 2⁹ = 55685533574273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5568553357474 + ... + 5568553357483.

It is an arithmetic number, because the mean of its divisors is an integer number (16705660072437).

Almost surely, 2^{55685533574785} is an apocalyptic number.

It is an amenable number.

55685533574785 is a deficient number, since it is larger than the sum of its proper divisors (11137106714963).

55685533574785 is a wasteful number, since it uses less digits than its factorization.

55685533574785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11137106714962.

The product of its digits is 10584000000, while the sum is 76.

The spelling of 55685533574785 in words is "fifty-five trillion, six hundred eighty-five billion, five hundred thirty-three million, five hundred seventy-four thousand, seven hundred eighty-five".