55685533574787 has 4 divisors (see below), whose sum is σ = 74247378099720. Its totient is φ = 37123689049856.

The previous prime is 55685533574747. The next prime is 55685533574809. The reversal of 55685533574787 is 78747533558655.

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 55685533574787 - 2¹² = 55685533570691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55685533574707) 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, 9280922262462 + ... + 9280922262467.

It is an arithmetic number, because the mean of its divisors is an integer number (18561844524930).

Almost surely, 2^{55685533574787} is an apocalyptic number.

55685533574787 is a deficient number, since it is larger than the sum of its proper divisors (18561844524933).

55685533574787 is a wasteful number, since it uses less digits than its factorization.

55685533574787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18561844524932.

The product of its digits is 14817600000, while the sum is 78.

The spelling of 55685533574787 in words is "fifty-five trillion, six hundred eighty-five billion, five hundred thirty-three million, five hundred seventy-four thousand, seven hundred eighty-seven".