43042161939 has 32 divisors (see below), whose sum is σ = 66895248384. Its totient is φ = 24106293120.

The previous prime is 43042161893. The next prime is 43042161983. The reversal of 43042161939 is 93916124034.

It is not a de Polignac number, because 43042161939 - 2¹² = 43042157843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43042161939.

It is not an unprimeable number, because it can be changed into a prime (43042161839) 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 31 ways as a sum of consecutive naturals, for example, 1074409 + ... + 1113749.

It is an arithmetic number, because the mean of its divisors is an integer number (2090476512).

Almost surely, 2^43042161939 is an apocalyptic number.

43042161939 is a deficient number, since it is larger than the sum of its proper divisors (23853086445).

43042161939 is a wasteful number, since it uses less digits than its factorization.

43042161939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40387.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 43042161939 in words is "forty-three billion, forty-two million, one hundred sixty-one thousand, nine hundred thirty-nine".