859155641 has 4 divisors (see below), whose sum is σ = 859367652. Its totient is φ = 858943632.

The previous prime is 859155637. The next prime is 859155677. The reversal of 859155641 is 146551958.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 502701241 + 356454400 = 22421^2 + 18880^2 .

It is a cyclic number.

It is not a de Polignac number, because 859155641 - 2² = 859155637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 859155592 and 859155601.

It is not an unprimeable number, because it can be changed into a prime (859155631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99806 + ... + 108071.

It is an arithmetic number, because the mean of its divisors is an integer number (214841913).

Almost surely, 2^859155641 is an apocalyptic number.

It is an amenable number.

859155641 is a deficient number, since it is larger than the sum of its proper divisors (212011).

859155641 is a wasteful number, since it uses less digits than its factorization.

859155641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212010.

The product of its digits is 216000, while the sum is 44.

The square root of 859155641 is about 29311.3568604389. The cubic root of 859155641 is about 950.6572150364.

The spelling of 859155641 in words is "eight hundred fifty-nine million, one hundred fifty-five thousand, six hundred forty-one".