39505957939 has 16 divisors (see below), whose sum is σ = 45409851648. Its totient is φ = 33667516512.

The previous prime is 39505957927. The next prime is 39505957961. The reversal of 39505957939 is 93975950593.

It is a de Polignac number, because none of the positive numbers 2^k-39505957939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39505957979) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1186452 + ... + 1219294.

It is an arithmetic number, because the mean of its divisors is an integer number (2838115728).

Almost surely, 2^39505957939 is an apocalyptic number.

39505957939 is a deficient number, since it is larger than the sum of its proper divisors (5903893709).

39505957939 is a wasteful number, since it uses less digits than its factorization.

39505957939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33834.

The product of its (nonzero) digits is 51667875, while the sum is 64.

The spelling of 39505957939 in words is "thirty-nine billion, five hundred five million, nine hundred fifty-seven thousand, nine hundred thirty-nine".