861312268 has 6 divisors (see below), whose sum is σ = 1507296476. Its totient is φ = 430656132.

The previous prime is 861312251. The next prime is 861312299. The reversal of 861312268 is 862213168.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107664030 + ... + 107664037.

Almost surely, 2^861312268 is an apocalyptic number.

It is an amenable number.

861312268 is a deficient number, since it is larger than the sum of its proper divisors (645984208).

861312268 is a wasteful number, since it uses less digits than its factorization.

861312268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215328071 (or 215328069 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 861312268 is about 29348.1220523563. The cubic root of 861312268 is about 951.4519875809.

The spelling of 861312268 in words is "eight hundred sixty-one million, three hundred twelve thousand, two hundred sixty-eight".