1006685135569 has 3 divisors (see below), whose sum is σ = 1006686138907. Its totient is φ = 1006684132232.

The previous prime is 1006685135563. The next prime is 1006685135609. The reversal of 1006685135569 is 9655315866001.

The square root of 1006685135569 is 1003337.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 679857966225 + 326827169344 = 824535^2 + 571688^2 .

It is not a de Polignac number, because 1006685135569 - 2¹³ = 1006685127377 is a prime.

It is a super-2 number, since 2×1006685135569² (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 (1006685135563) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 501669 + ... + 1505005.

Almost surely, 2^{1006685135569} is an apocalyptic number.

1006685135569 is the 1003337-th square number.

1006685135569 is the 501669-th centered octagonal number.

It is an amenable number.

1006685135569 is a deficient number, since it is larger than the sum of its proper divisors (1003338).

1006685135569 is an frugal number, since it uses more digits than its factorization.

1006685135569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006674 (or 1003337 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 55.

The spelling of 1006685135569 in words is "one trillion, six billion, six hundred eighty-five million, one hundred thirty-five thousand, five hundred sixty-nine".