861361015 has 8 divisors (see below), whose sum is σ = 1094435280. Its totient is φ = 648554112.

The previous prime is 861361003. The next prime is 861361037. The reversal of 861361015 is 510163168.

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

It is a cyclic number.

It is not a de Polignac number, because 861361015 - 2⁷ = 861360887 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 5066745 + ... + 5066914.

It is an arithmetic number, because the mean of its divisors is an integer number (136804410).

Almost surely, 2^861361015 is an apocalyptic number.

861361015 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

861361015 is a deficient number, since it is larger than the sum of its proper divisors (233074265).

861361015 is a wasteful number, since it uses less digits than its factorization.

861361015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10133681.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 861361015 is about 29348.9525366750. The cubic root of 861361015 is about 951.4699367641.

The spelling of 861361015 in words is "eight hundred sixty-one million, three hundred sixty-one thousand, fifteen".