856019095369 has 9 divisors (see below), whose sum is σ = 858778601269. Its totient is φ = 853268437120.

The previous prime is 856019095339. The next prime is 856019095423. The reversal of 856019095369 is 963590910658.

The square root of 856019095369 is 925213.

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

It can be written as a sum of positive squares in 4 ways, for example, as 55731405625 + 800287689744 = 236075^2 + 894588^2 .

It is not a de Polignac number, because 856019095369 - 2⁷ = 856019095241 is a prime.

It is a super-2 number, since 2×856019095369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856019095339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 326598879 + ... + 326601499.

Almost surely, 2^856019095369 is an apocalyptic number.

856019095369 is the 925213-rd square number.

856019095369 is the 462607-th centered octagonal number.

It is an amenable number.

856019095369 is a deficient number, since it is larger than the sum of its proper divisors (2759505900).

856019095369 is an frugal number, since it uses more digits than its factorization.

856019095369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5948 (or 2974 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 61.

The spelling of 856019095369 in words is "eight hundred fifty-six billion, nineteen million, ninety-five thousand, three hundred sixty-nine".