8189640854 has 8 divisors (see below), whose sum is σ = 12289509408. Its totient is φ = 4093137720.

The previous prime is 8189640779. The next prime is 8189640863. The reversal of 8189640854 is 4580469818.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 8189640796 and 8189640805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835262 + ... + 845009.

It is an arithmetic number, because the mean of its divisors is an integer number (1536188676).

Almost surely, 2^8189640854 is an apocalyptic number.

8189640854 is a deficient number, since it is larger than the sum of its proper divisors (4099868554).

8189640854 is a wasteful number, since it uses less digits than its factorization.

8189640854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682710.

The product of its (nonzero) digits is 2211840, while the sum is 53.

The square root of 8189640854 is about 90496.6344899080. The cubic root of 8189640854 is about 2015.6801496835.

The spelling of 8189640854 in words is "eight billion, one hundred eighty-nine million, six hundred forty thousand, eight hundred fifty-four".