11644643670031 has 2 divisors, whose sum is σ = 11644643670032. Its totient is φ = 11644643670030.

The previous prime is 11644643669977. The next prime is 11644643670053. The reversal of 11644643670031 is 13007634644611.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13007634644611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11644643670031 - 2¹⁹ = 11644643145743 is a prime.

It is a super-2 number, since 2×11644643670031² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11644643670061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5822321835015 + 5822321835016.

It is an arithmetic number, because the mean of its divisors is an integer number (5822321835016).

Almost surely, 2^{11644643670031} is an apocalyptic number.

11644643670031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11644643670031 is an equidigital number, since it uses as much as digits as its factorization.

11644643670031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 46.

It can be divided in two parts, 1164464 and 3670031, that added together give a triangular number (4834495 = T₃₁₀₉).

The spelling of 11644643670031 in words is "eleven trillion, six hundred forty-four billion, six hundred forty-three million, six hundred seventy thousand, thirty-one".