9855567655 has 4 divisors (see below), whose sum is σ = 11826681192. Its totient is φ = 7884454120.

The previous prime is 9855567619. The next prime is 9855567677. The reversal of 9855567655 is 5567655589.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5567655589 = 1607 ⋅3464627.

It is not a de Polignac number, because 9855567655 - 2²⁹ = 9318696743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9855567593 and 9855567602.

It is a congruent 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, 985556761 + ... + 985556770.

It is an arithmetic number, because the mean of its divisors is an integer number (2956670298).

Almost surely, 2^9855567655 is an apocalyptic number.

9855567655 is a deficient number, since it is larger than the sum of its proper divisors (1971113537).

9855567655 is a wasteful number, since it uses less digits than its factorization.

9855567655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971113536.

The product of its digits is 56700000, while the sum is 61.

The square root of 9855567655 is about 99275.2116844885. The cubic root of 9855567655 is about 2144.0120136021.

The spelling of 9855567655 in words is "nine billion, eight hundred fifty-five million, five hundred sixty-seven thousand, six hundred fifty-five".