39969605776 has 45 divisors (see below), whose sum is σ = 78193594899. Its totient is φ = 19792476000.

The previous prime is 39969605737. The next prime is 39969605791. The reversal of 39969605776 is 67750696993.

The square root of 39969605776 is 199924.

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

It is a Duffinian 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, 120753931 + ... + 120754261.

Almost surely, 2^39969605776 is an apocalyptic number.

39969605776 is the 199924-th square number.

It is an amenable number.

39969605776 is a deficient number, since it is larger than the sum of its proper divisors (38223989123).

39969605776 is an frugal number, since it uses more digits than its factorization.

39969605776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 115736040, while the sum is 67.

The spelling of 39969605776 in words is "thirty-nine billion, nine hundred sixty-nine million, six hundred five thousand, seven hundred seventy-six".