859450944991 has 2 divisors, whose sum is σ = 859450944992. Its totient is φ = 859450944990.

The previous prime is 859450944973. The next prime is 859450945019. The reversal of 859450944991 is 199449054958.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 859450944991 - 2¹⁵ = 859450912223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859450944491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429725472495 + 429725472496.

It is an arithmetic number, because the mean of its divisors is an integer number (429725472496).

Almost surely, 2^859450944991 is an apocalyptic number.

859450944991 is a deficient number, since it is larger than the sum of its proper divisors (1).

859450944991 is an equidigital number, since it uses as much as digits as its factorization.

859450944991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 83980800, while the sum is 67.

The spelling of 859450944991 in words is "eight hundred fifty-nine billion, four hundred fifty million, nine hundred forty-four thousand, nine hundred ninety-one".