2645744371543 has 32 divisors (see below), whose sum is σ = 3311164846080. Its totient is φ = 2058227176320.

The previous prime is 2645744371537. The next prime is 2645744371549. The reversal of 2645744371543 is 3451734475462.

It is an interprime number because it is at equal distance from previous prime (2645744371537) and next prime (2645744371549).

It is not a de Polignac number, because 2645744371543 - 2⁹ = 2645744371031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645744371549) 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 31 ways as a sum of consecutive naturals, for example, 1813293 + ... + 2929081.

It is an arithmetic number, because the mean of its divisors is an integer number (103473901440).

Almost surely, 2^{2645744371543} is an apocalyptic number.

2645744371543 is a deficient number, since it is larger than the sum of its proper divisors (665420474537).

2645744371543 is a wasteful number, since it uses less digits than its factorization.

2645744371543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116247.

The product of its digits is 33868800, while the sum is 55.

The spelling of 2645744371543 in words is "two trillion, six hundred forty-five billion, seven hundred forty-four million, three hundred seventy-one thousand, five hundred forty-three".