39923646849 has 48 divisors (see below), whose sum is σ = 63062388480. Its totient is φ = 25170270480.

The previous prime is 39923646827. The next prime is 39923646863. The reversal of 39923646849 is 94864632993.

39923646849 is a `hidden beast` number, since 399 + 236 + 4 + 6 + 8 + 4 + 9 = 666.

It is not a de Polignac number, because 39923646849 - 2⁸ = 39923646593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39923646899) 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 47 ways as a sum of consecutive naturals, for example, 2702814 + ... + 2717544.

It is an arithmetic number, because the mean of its divisors is an integer number (1313799760).

Almost surely, 2^39923646849 is an apocalyptic number.

It is an amenable number.

39923646849 is a deficient number, since it is larger than the sum of its proper divisors (23138741631).

39923646849 is a wasteful number, since it uses less digits than its factorization.

39923646849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15352 (or 15340 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 63.

The spelling of 39923646849 in words is "thirty-nine billion, nine hundred twenty-three million, six hundred forty-six thousand, eight hundred forty-nine".