3565522051081 has 9 divisors (see below), whose sum is σ = 3650452649319. Its totient is φ = 3482523626736.

The previous prime is 3565522051073. The next prime is 3565522051087. The reversal of 3565522051081 is 1801502255653.

It is a happy number.

The square root of 3565522051081 is 1888259.

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

It can be written as a sum of positive squares in only one way, i.e., 2741392161225 + 824129889856 = 1655715^2 + 907816^2 .

It is not a de Polignac number, because 3565522051081 - 2³ = 3565522051073 is a prime.

It is a super-2 number, since 2×3565522051081² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3565522051087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 81173181 + ... + 81217093.

Almost surely, 2^{3565522051081} is an apocalyptic number.

3565522051081 is the 1888259-th square number.

3565522051081 is the 944130-th centered octagonal number.

It is an amenable number.

3565522051081 is a deficient number, since it is larger than the sum of its proper divisors (84930598238).

3565522051081 is an frugal number, since it uses more digits than its factorization.

3565522051081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87912 (or 43956 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 43.

The spelling of 3565522051081 in words is "three trillion, five hundred sixty-five billion, five hundred twenty-two million, fifty-one thousand, eighty-one".