40811864543 has 4 divisors (see below), whose sum is σ = 40814004000. Its totient is φ = 40809725088.

The previous prime is 40811864537. The next prime is 40811864557. The reversal of 40811864543 is 34546811804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40811864543 - 2⁶ = 40811864479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40811864494 and 40811864503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40811864563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040855 + ... + 1079352.

It is an arithmetic number, because the mean of its divisors is an integer number (10203501000).

Almost surely, 2^40811864543 is an apocalyptic number.

40811864543 is a deficient number, since it is larger than the sum of its proper divisors (2139457).

40811864543 is a wasteful number, since it uses less digits than its factorization.

40811864543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139456.

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 40811864543 in words is "forty billion, eight hundred eleven million, eight hundred sixty-four thousand, five hundred forty-three".