9855928447 has 4 divisors (see below), whose sum is σ = 9856331136. Its totient is φ = 9855525760.

The previous prime is 9855928427. The next prime is 9855928451. The reversal of 9855928447 is 7448295589.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9855928447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855928427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162079 + ... + 214432.

It is an arithmetic number, because the mean of its divisors is an integer number (2464082784).

Almost surely, 2^9855928447 is an apocalyptic number.

9855928447 is a deficient number, since it is larger than the sum of its proper divisors (402689).

9855928447 is a wasteful number, since it uses less digits than its factorization.

9855928447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402688.

The product of its digits is 29030400, while the sum is 61.

The square root of 9855928447 is about 99277.0287982069. The cubic root of 9855928447 is about 2144.0381759018.

The spelling of 9855928447 in words is "nine billion, eight hundred fifty-five million, nine hundred twenty-eight thousand, four hundred forty-seven".