861882107958 has 32 divisors (see below), whose sum is σ = 1915478056800. Its totient is φ = 287266363488.

The previous prime is 861882107909. The next prime is 861882107969. The reversal of 861882107958 is 859701288168.

861882107958 is a `hidden beast` number, since 8 + 618 + 8 + 2 + 1 + 0 + 7 + 9 + 5 + 8 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 861882107895 and 861882107904.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 198993 + ... + 1327916.

It is an arithmetic number, because the mean of its divisors is an integer number (59858689275).

Almost surely, 2^861882107958 is an apocalyptic number.

861882107958 is an abundant number, since it is smaller than the sum of its proper divisors (1053595948842).

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

861882107958 is a wasteful number, since it uses less digits than its factorization.

861882107958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537373 (or 1537367 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 63.

The spelling of 861882107958 in words is "eight hundred sixty-one billion, eight hundred eighty-two million, one hundred seven thousand, nine hundred fifty-eight".