816146889 has 8 divisors (see below), whose sum is σ = 1123299072. Its totient is φ = 526546320.

The previous prime is 816146839. The next prime is 816146893. The reversal of 816146889 is 988641618.

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

It is not a de Polignac number, because 816146889 - 2⁹ = 816146377 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (816146839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4387794 + ... + 4387979.

It is an arithmetic number, because the mean of its divisors is an integer number (140412384).

Almost surely, 2^816146889 is an apocalyptic number.

It is an amenable number.

816146889 is a deficient number, since it is larger than the sum of its proper divisors (307152183).

816146889 is a wasteful number, since it uses less digits than its factorization.

816146889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8775807.

The product of its digits is 663552, while the sum is 51.

The square root of 816146889 is about 28568.2846702423. The cubic root of 816146889 is about 934.5218136872.

The spelling of 816146889 in words is "eight hundred sixteen million, one hundred forty-six thousand, eight hundred eighty-nine".