861917344336 has 20 divisors (see below), whose sum is σ = 1671323692500. Its totient is φ = 430608004352.

The previous prime is 861917344303. The next prime is 861917344367. The reversal of 861917344336 is 633443719168.

It can be written as a sum of positive squares in 2 ways, for example, as 760984054336 + 100933290000 = 872344^2 + 317700^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21896461 + ... + 21935788.

It is an arithmetic number, because the mean of its divisors is an integer number (83566184625).

Almost surely, 2^861917344336 is an apocalyptic number.

It is an amenable number.

861917344336 is a deficient number, since it is larger than the sum of its proper divisors (809406348164).

861917344336 is a wasteful number, since it uses less digits than its factorization.

861917344336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43833486 (or 43833480 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 55.

The spelling of 861917344336 in words is "eight hundred sixty-one billion, nine hundred seventeen million, three hundred forty-four thousand, three hundred thirty-six".