810686493971 has 8 divisors (see below), whose sum is σ = 876417832080. Its totient is φ = 747261518688.

The previous prime is 810686493917. The next prime is 810686493973. The reversal of 810686493971 is 179394686018.

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

It is a cyclic number.

It is not a de Polignac number, because 810686493971 - 2³⁴ = 793506624787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (810686493973) 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 7 ways as a sum of consecutive naturals, for example, 576589976 + ... + 576591381.

It is an arithmetic number, because the mean of its divisors is an integer number (109552229010).

Almost surely, 2^810686493971 is an apocalyptic number.

810686493971 is a deficient number, since it is larger than the sum of its proper divisors (65731338109).

810686493971 is a wasteful number, since it uses less digits than its factorization.

810686493971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153181413.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 810686493971 in words is "eight hundred ten billion, six hundred eighty-six million, four hundred ninety-three thousand, nine hundred seventy-one".