861253366 has 8 divisors (see below), whose sum is σ = 1326795840. Its totient is φ = 418988088.

The previous prime is 861253279. The next prime is 861253373. The reversal of 861253366 is 663352168.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5819206 + ... + 5819353.

It is an arithmetic number, because the mean of its divisors is an integer number (165849480).

Almost surely, 2^861253366 is an apocalyptic number.

861253366 is a deficient number, since it is larger than the sum of its proper divisors (465542474).

861253366 is a wasteful number, since it uses less digits than its factorization.

861253366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11638598.

The product of its digits is 155520, while the sum is 40.

The square root of 861253366 is about 29347.1185297637. The cubic root of 861253366 is about 951.4302983111.

The spelling of 861253366 in words is "eight hundred sixty-one million, two hundred fifty-three thousand, three hundred sixty-six".