813109433217 has 8 divisors (see below), whose sum is σ = 1084150654560. Its totient is φ = 542070583680.

The previous prime is 813109433177. The next prime is 813109433233. The reversal of 813109433217 is 712334901318.

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

It is not a de Polignac number, because 813109433217 - 2⁶ = 813109433153 is a prime.

It is a super-2 number, since 2×813109433217² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813109433317) 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, 489009 + ... + 1365777.

It is an arithmetic number, because the mean of its divisors is an integer number (135518831820).

Almost surely, 2^813109433217 is an apocalyptic number.

It is an amenable number.

813109433217 is a deficient number, since it is larger than the sum of its proper divisors (271041221343).

813109433217 is a wasteful number, since it uses less digits than its factorization.

813109433217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185903.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 813109433217 in words is "eight hundred thirteen billion, one hundred nine million, four hundred thirty-three thousand, two hundred seventeen".