43145044004 has 12 divisors (see below), whose sum is σ = 75516492828. Its totient is φ = 21568903200.

The previous prime is 43145043989. The next prime is 43145044009. The reversal of 43145044004 is 40044054134.

It can be written as a sum of positive squares in 2 ways, for example, as 8324737600 + 34820306404 = 91240^2 + 186602^2 .

It is a super-2 number, since 2×43145044004² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43145044009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877787 + ... + 925634.

It is an arithmetic number, because the mean of its divisors is an integer number (6293041069).

Almost surely, 2^43145044004 is an apocalyptic number.

It is an amenable number.

43145044004 is a deficient number, since it is larger than the sum of its proper divisors (32371448824).

43145044004 is a wasteful number, since it uses less digits than its factorization.

43145044004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809406 (or 1809404 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 43145044004 its reverse (40044054134), we get a palindrome (83189098138).

The spelling of 43145044004 in words is "forty-three billion, one hundred forty-five million, forty-four thousand, four".