861949168 has 40 divisors (see below), whose sum is σ = 1712301120. Its totient is φ = 420138240.

The previous prime is 861949157. The next prime is 861949169.

861949168 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861949169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200158 + ... + 204418.

It is an arithmetic number, because the mean of its divisors is an integer number (42807528).

Almost surely, 2^861949168 is an apocalyptic number.

It is an amenable number.

861949168 is a deficient number, since it is larger than the sum of its proper divisors (850351952).

861949168 is a wasteful number, since it uses less digits than its factorization.

861949168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585 (or 4579 counting only the distinct ones).

The product of its digits is 746496, while the sum is 52.

The square root of 861949168 is about 29358.9708266485. The cubic root of 861949168 is about 951.6864478303.

The spelling of 861949168 in words is "eight hundred sixty-one million, nine hundred forty-nine thousand, one hundred sixty-eight".