3640084189081 has 4 divisors (see below), whose sum is σ = 3649161706164. Its totient is φ = 3631006672000.

The previous prime is 3640084189051. The next prime is 3640084189169. The reversal of 3640084189081 is 1809814800463.

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 3485091585600 + 154992603481 = 1866840^2 + 393691^2 .

It is a cyclic number.

It is not a de Polignac number, because 3640084189081 - 2⁷ = 3640084188953 is a prime.

It is a super-2 number, since 2×3640084189081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3640084189051) 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, 4538757940 + ... + 4538758741.

It is an arithmetic number, because the mean of its divisors is an integer number (912290426541).

Almost surely, 2^{3640084189081} is an apocalyptic number.

It is an amenable number.

3640084189081 is a deficient number, since it is larger than the sum of its proper divisors (9077517083).

3640084189081 is an equidigital number, since it uses as much as digits as its factorization.

3640084189081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9077517082.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 3640084189081 in words is "three trillion, six hundred forty billion, eighty-four million, one hundred eighty-nine thousand, eighty-one".