861842668327 has 16 divisors (see below), whose sum is σ = 879569280000. Its totient is φ = 844225447744.

The previous prime is 861842668273. The next prime is 861842668373. The reversal of 861842668327 is 723866248168.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861842668327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861842368327) 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, 18877674 + ... + 18923272.

It is an arithmetic number, because the mean of its divisors is an integer number (54973080000).

Almost surely, 2^861842668327 is an apocalyptic number.

861842668327 is a deficient number, since it is larger than the sum of its proper divisors (17726611673).

861842668327 is a wasteful number, since it uses less digits than its factorization.

861842668327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46790.

The product of its digits is 37158912, while the sum is 61.

It can be divided in two parts, 861842 and 668327, that added together give a square (1530169 = 1237²).

The spelling of 861842668327 in words is "eight hundred sixty-one billion, eight hundred forty-two million, six hundred sixty-eight thousand, three hundred twenty-seven".