850857571708369 has 15 divisors (see below), whose sum is σ = 856110043156665. Its totient is φ = 845637317101500.

The previous prime is 850857571708337. The next prime is 850857571708433. The reversal of 850857571708369 is 963807175758058.

The square root of 850857571708369 is 29169463.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 850857571708369 - 2⁵ = 850857571708337 is a prime.

It is a super-2 number, since 2×850857571708369² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (850857571708069) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1837705338232 + ... + 1837705338694.

It is an arithmetic number, because the mean of its divisors is an integer number (57074002877111).

Almost surely, 2^{850857571708369} is an apocalyptic number.

850857571708369 is the 29169463-rd square number.

850857571708369 is the 14584732-nd centered octagonal number.

It is an amenable number.

850857571708369 is a deficient number, since it is larger than the sum of its proper divisors (5252471448296).

850857571708369 is an frugal number, since it uses more digits than its factorization.

850857571708369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 3556224000, while the sum is 79.

The spelling of 850857571708369 in words is "eight hundred fifty trillion, eight hundred fifty-seven billion, five hundred seventy-one million, seven hundred eight thousand, three hundred sixty-nine".