813655683609 has 8 divisors (see below), whose sum is σ = 1084901647872. Its totient is φ = 542423420880.

The previous prime is 813655683601. The next prime is 813655683613. The reversal of 813655683609 is 906386556318.

It is a happy number.

813655683609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 813655683609 - 2³ = 813655683601 is a prime.

It is a super-2 number, since 2×813655683609² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (813655683601) 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, 3286009 + ... + 3524934.

It is an arithmetic number, because the mean of its divisors is an integer number (135612705984).

Almost surely, 2^813655683609 is an apocalyptic number.

It is an amenable number.

813655683609 is a deficient number, since it is larger than the sum of its proper divisors (271245964263).

813655683609 is a wasteful number, since it uses less digits than its factorization.

813655683609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850767.

The product of its (nonzero) digits is 27993600, while the sum is 60.

The spelling of 813655683609 in words is "eight hundred thirteen billion, six hundred fifty-five million, six hundred eighty-three thousand, six hundred nine".