4000344543 has 32 divisors (see below), whose sum is σ = 6397298880. Its totient is φ = 2455971840.

The previous prime is 4000344541. The next prime is 4000344571. The reversal of 4000344543 is 3454430004.

It is not a de Polignac number, because 4000344543 - 2¹ = 4000344541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000344541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138823 + ... + 165143.

It is an arithmetic number, because the mean of its divisors is an integer number (199915590).

Almost surely, 2^4000344543 is an apocalyptic number.

4000344543 is a deficient number, since it is larger than the sum of its proper divisors (2396954337).

4000344543 is a wasteful number, since it uses less digits than its factorization.

4000344543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26776 (or 26770 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 4000344543 is about 63248.2769962945. The cubic root of 4000344543 is about 1587.4466279864.

Adding to 4000344543 its reverse (3454430004), we get a palindrome (7454774547).

The spelling of 4000344543 in words is "four billion, three hundred forty-four thousand, five hundred forty-three".