861882107994 has 12 divisors (see below), whose sum is σ = 1867411234026. Its totient is φ = 287294035992.

The previous prime is 861882107969. The next prime is 861882108001. The reversal of 861882107994 is 499701288168.

861882107994 is a `hidden beast` number, since 8 + 618 + 8 + 2 + 1 + 0 + 7 + 9 + 9 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 609903207369 + 251978900625 = 780963^2 + 501975^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23941169649 + ... + 23941169684.

Almost surely, 2^861882107994 is an apocalyptic number.

861882107994 is an abundant number, since it is smaller than the sum of its proper divisors (1005529126032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861882107994 is a wasteful number, since it uses less digits than its factorization.

861882107994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47882339341 (or 47882339338 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 861882107994 in words is "eight hundred sixty-one billion, eight hundred eighty-two million, one hundred seven thousand, nine hundred ninety-four".