2641665611731 has 16 divisors (see below), whose sum is σ = 2762626841856. Its totient is φ = 2521218544416.

The previous prime is 2641665611707. The next prime is 2641665611773. The reversal of 2641665611731 is 1371165661462.

It is a cyclic number.

It is not a de Polignac number, because 2641665611731 - 2¹⁷ = 2641665480659 is a prime.

It is a super-2 number, since 2×2641665611731² (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 (2641665611701) 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 15 ways as a sum of consecutive naturals, for example, 22213876 + ... + 22332478.

It is an arithmetic number, because the mean of its divisors is an integer number (172664177616).

Almost surely, 2^{2641665611731} is an apocalyptic number.

2641665611731 is a deficient number, since it is larger than the sum of its proper divisors (120961230125).

2641665611731 is a wasteful number, since it uses less digits than its factorization.

2641665611731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120762.

The product of its digits is 1088640, while the sum is 49.

The spelling of 2641665611731 in words is "two trillion, six hundred forty-one billion, six hundred sixty-five million, six hundred eleven thousand, seven hundred thirty-one".