861105808 has 10 divisors (see below), whose sum is σ = 1668392534. Its totient is φ = 430552896.

The previous prime is 861105799. The next prime is 861105851. The reversal of 861105808 is 808501168.

861105808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 620607744 + 240498064 = 24912^2 + 15508^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26909541 + ... + 26909572.

Almost surely, 2^861105808 is an apocalyptic number.

It is an amenable number.

861105808 is a deficient number, since it is larger than the sum of its proper divisors (807286726).

861105808 is a wasteful number, since it uses less digits than its factorization.

861105808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53819121 (or 53819115 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 37.

The square root of 861105808 is about 29344.6044103511. The cubic root of 861105808 is about 951.3759592219.

Adding to 861105808 its product of nonzero digits (15360), we get a palindrome (861121168).

The spelling of 861105808 in words is "eight hundred sixty-one million, one hundred five thousand, eight hundred eight".