861318115 has 16 divisors (see below), whose sum is σ = 1181845440. Its totient is φ = 590313600.

The previous prime is 861318097. The next prime is 861318121. The reversal of 861318115 is 511813168.

It is not a de Polignac number, because 861318115 - 2⁵ = 861318083 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78465 + ... + 88765.

It is an arithmetic number, because the mean of its divisors is an integer number (73865340).

Almost surely, 2^861318115 is an apocalyptic number.

861318115 is a deficient number, since it is larger than the sum of its proper divisors (320527325).

861318115 is a wasteful number, since it uses less digits than its factorization.

861318115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12702.

The product of its digits is 5760, while the sum is 34.

The square root of 861318115 is about 29348.2216667382. The cubic root of 861318115 is about 951.4541405465.

The spelling of 861318115 in words is "eight hundred sixty-one million, three hundred eighteen thousand, one hundred fifteen".