40001643143 has 16 divisors (see below), whose sum is σ = 49881534720. Its totient is φ = 31164264000.

The previous prime is 40001643137. The next prime is 40001643151. The reversal of 40001643143 is 34134610004.

It is a cyclic number.

It is not a de Polignac number, because 40001643143 - 2¹⁶ = 40001577607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001643113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389843 + ... + 481643.

It is an arithmetic number, because the mean of its divisors is an integer number (3117595920).

Almost surely, 2^40001643143 is an apocalyptic number.

40001643143 is a deficient number, since it is larger than the sum of its proper divisors (9879891577).

40001643143 is a wasteful number, since it uses less digits than its factorization.

40001643143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97478.

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 40001643143 in words is "forty billion, one million, six hundred forty-three thousand, one hundred forty-three".