39949161841 has 16 divisors (see below), whose sum is σ = 41102949888. Its totient is φ = 38804227200.

The previous prime is 39949161829. The next prime is 39949161887. The reversal of 39949161841 is 14816194993.

It is a cyclic number.

It is not a de Polignac number, because 39949161841 - 2¹³ = 39949153649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39949168841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21913056 + ... + 21914878.

It is an arithmetic number, because the mean of its divisors is an integer number (2568934368).

Almost surely, 2^39949161841 is an apocalyptic number.

It is an amenable number.

39949161841 is a deficient number, since it is larger than the sum of its proper divisors (1153788047).

39949161841 is a wasteful number, since it uses less digits than its factorization.

39949161841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3912.

The product of its digits is 1679616, while the sum is 55.

The spelling of 39949161841 in words is "thirty-nine billion, nine hundred forty-nine million, one hundred sixty-one thousand, eight hundred forty-one".