10856826569 has 4 divisors (see below), whose sum is σ = 11495463444. Its totient is φ = 10218189696.

The previous prime is 10856826553. The next prime is 10856826581. The reversal of 10856826569 is 96562865801.

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 5256250000 + 5600576569 = 72500^2 + 74837^2 .

It is a cyclic number.

It is not a de Polignac number, because 10856826569 - 2⁴ = 10856826553 is a prime.

It is a super-2 number, since 2×10856826569² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10856826509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319318412 + ... + 319318445.

It is an arithmetic number, because the mean of its divisors is an integer number (2873865861).

Almost surely, 2^10856826569 is an apocalyptic number.

It is an amenable number.

10856826569 is a deficient number, since it is larger than the sum of its proper divisors (638636875).

10856826569 is an equidigital number, since it uses as much as digits as its factorization.

10856826569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638636874.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 10856826569 in words is "ten billion, eight hundred fifty-six million, eight hundred twenty-six thousand, five hundred sixty-nine".