861618076 has 12 divisors (see below), whose sum is σ = 1644907320. Its totient is φ = 391644560.

The previous prime is 861618073. The next prime is 861618083. The reversal of 861618076 is 670816168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861618073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9791071 + ... + 9791158.

It is an arithmetic number, because the mean of its divisors is an integer number (137075610).

Almost surely, 2^861618076 is an apocalyptic number.

It is an amenable number.

861618076 is a deficient number, since it is larger than the sum of its proper divisors (783289244).

861618076 is a wasteful number, since it uses less digits than its factorization.

861618076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19582244 (or 19582242 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 861618076 is about 29353.3315996668. The cubic root of 861618076 is about 951.5645782605.

The spelling of 861618076 in words is "eight hundred sixty-one million, six hundred eighteen thousand, seventy-six".