809231899677 has 16 divisors (see below), whose sum is σ = 1100073519360. Its totient is φ = 528952803392.

The previous prime is 809231899669. The next prime is 809231899691. The reversal of 809231899677 is 776998132908.

It is a cyclic number.

It is not a de Polignac number, because 809231899677 - 2³ = 809231899669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809231899657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474902 + ... + 1947767.

It is an arithmetic number, because the mean of its divisors is an integer number (68754594960).

Almost surely, 2^809231899677 is an apocalyptic number.

It is an amenable number.

809231899677 is a deficient number, since it is larger than the sum of its proper divisors (290841619683).

809231899677 is a wasteful number, since it uses less digits than its factorization.

809231899677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424212.

The product of its (nonzero) digits is 82301184, while the sum is 69.

The spelling of 809231899677 in words is "eight hundred nine billion, two hundred thirty-one million, eight hundred ninety-nine thousand, six hundred seventy-seven".