810216413889 has 4 divisors (see below), whose sum is σ = 1080288551856. Its totient is φ = 540144275924.

The previous prime is 810216413879. The next prime is 810216413893. The reversal of 810216413889 is 988314612018.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 810216413889 - 2⁷ = 810216413761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (810216413879) 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, 135036068979 + ... + 135036068984.

It is an arithmetic number, because the mean of its divisors is an integer number (270072137964).

Almost surely, 2^810216413889 is an apocalyptic number.

It is an amenable number.

810216413889 is a deficient number, since it is larger than the sum of its proper divisors (270072137967).

810216413889 is a wasteful number, since it uses less digits than its factorization.

810216413889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270072137966.

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

The spelling of 810216413889 in words is "eight hundred ten billion, two hundred sixteen million, four hundred thirteen thousand, eight hundred eighty-nine".