43049408738 has 18 divisors (see below), whose sum is σ = 75120409611. Its totient is φ = 18448866324.

The previous prime is 43049408719. The next prime is 43049408791. The reversal of 43049408738 is 83780494034.

It can be written as a sum of positive squares in only one way, i.e., 21524704369 + 21524704369 = 146713^2 + 146713^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=146713.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 2043503 + ... + 2064461.

Almost surely, 2^43049408738 is an apocalyptic number.

43049408738 is a deficient number, since it is larger than the sum of its proper divisors (32071000873).

43049408738 is an frugal number, since it uses more digits than its factorization.

43049408738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41934 (or 20968 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 50.

Multiplying 43049408738 by its sum of digits (50), we get a square (2152470436900 = 1467130²).

The spelling of 43049408738 in words is "forty-three billion, forty-nine million, four hundred eight thousand, seven hundred thirty-eight".