8678553991 has 4 divisors (see below), whose sum is σ = 8880380872. Its totient is φ = 8476727112.

The previous prime is 8678553931. The next prime is 8678554037. The reversal of 8678553991 is 1993558768.

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 8678553991 - 2¹¹ = 8678551943 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 (8678553931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100913376 + ... + 100913461.

It is an arithmetic number, because the mean of its divisors is an integer number (2220095218).

Almost surely, 2^8678553991 is an apocalyptic number.

8678553991 is a deficient number, since it is larger than the sum of its proper divisors (201826881).

8678553991 is a wasteful number, since it uses less digits than its factorization.

8678553991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201826880.

The product of its digits is 16329600, while the sum is 61.

The square root of 8678553991 is about 93158.7569206460. The cubic root of 8678553991 is about 2055.0187554207.

The spelling of 8678553991 in words is "eight billion, six hundred seventy-eight million, five hundred fifty-three thousand, nine hundred ninety-one".