856417109331 has 8 divisors (see below), whose sum is σ = 1305016547584. Its totient is φ = 489381205320.

The previous prime is 856417109329. The next prime is 856417109333. The reversal of 856417109331 is 133901714658.

It is an interprime number because it is at equal distance from previous prime (856417109329) and next prime (856417109333).

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

It is not a de Polignac number, because 856417109331 - 2¹ = 856417109329 is a prime.

It is a super-2 number, since 2×856417109331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856417109333) 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, 20390883535 + ... + 20390883576.

It is an arithmetic number, because the mean of its divisors is an integer number (163127068448).

Almost surely, 2^856417109331 is an apocalyptic number.

856417109331 is a deficient number, since it is larger than the sum of its proper divisors (448599438253).

856417109331 is a wasteful number, since it uses less digits than its factorization.

856417109331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40781767121.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 856417109331 in words is "eight hundred fifty-six billion, four hundred seventeen million, one hundred nine thousand, three hundred thirty-one".