39109808644 has 27 divisors (see below), whose sum is σ = 69625513503. Its totient is φ = 19222466400.

The previous prime is 39109808641. The next prime is 39109808659. The reversal of 39109808644 is 44680890193.

It is a happy number.

The square root of 39109808644 is 197762.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3886026244 + 35223782400 = 62338^2 + 187680^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39109808591 and 39109808600.

It is not an unprimeable number, because it can be changed into a prime (39109808641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24126154 + ... + 24127774.

Almost surely, 2^39109808644 is an apocalyptic number.

39109808644 is the 197762-nd square number.

It is an amenable number.

39109808644 is a deficient number, since it is larger than the sum of its proper divisors (30515704859).

39109808644 is an frugal number, since it uses more digits than its factorization.

39109808644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 39109808644 in words is "thirty-nine billion, one hundred nine million, eight hundred eight thousand, six hundred forty-four".