861693853854 has 16 divisors (see below), whose sum is σ = 1723597745040. Its totient is φ = 287196278400.

The previous prime is 861693853847. The next prime is 861693853877. The reversal of 861693853854 is 458358396168.

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 7 ways as a sum of consecutive naturals, for example, 8698197 + ... + 8796704.

It is an arithmetic number, because the mean of its divisors is an integer number (107724859065).

Almost surely, 2^861693853854 is an apocalyptic number.

861693853854 is an abundant number, since it is smaller than the sum of its proper divisors (861903891186).

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

861693853854 is a wasteful number, since it uses less digits than its factorization.

861693853854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17503115.

The product of its digits is 149299200, while the sum is 66.

The spelling of 861693853854 in words is "eight hundred sixty-one billion, six hundred ninety-three million, eight hundred fifty-three thousand, eight hundred fifty-four".