861318258 has 8 divisors (see below), whose sum is σ = 1722636528. Its totient is φ = 287106084.

The previous prime is 861318257. The next prime is 861318259. The reversal of 861318258 is 852813168.

It is an interprime number because it is at equal distance from previous prime (861318257) and next prime (861318259).

It is a sphenic number, since it is the product of 3 distinct primes.

861318258 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (861318257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71776516 + ... + 71776527.

It is an arithmetic number, because the mean of its divisors is an integer number (215329566).

Almost surely, 2^861318258 is an apocalyptic number.

861318258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

861318258 is a wasteful number, since it uses less digits than its factorization.

861318258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143553048.

The product of its digits is 92160, while the sum is 42.

The square root of 861318258 is about 29348.2241030015. The cubic root of 861318258 is about 951.4541932015.

The spelling of 861318258 in words is "eight hundred sixty-one million, three hundred eighteen thousand, two hundred fifty-eight".