39669884649 has 32 divisors (see below), whose sum is σ = 59463676800. Its totient is φ = 26134859520.

The previous prime is 39669884623. The next prime is 39669884671. The reversal of 39669884649 is 94648896693.

It is not a de Polignac number, because 39669884649 - 2¹¹ = 39669882601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39669884609) 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 31 ways as a sum of consecutive naturals, for example, 5862342 + ... + 5869104.

It is an arithmetic number, because the mean of its divisors is an integer number (1858239900).

Almost surely, 2^39669884649 is an apocalyptic number.

It is an amenable number.

39669884649 is a deficient number, since it is larger than the sum of its proper divisors (19793792151).

39669884649 is a wasteful number, since it uses less digits than its factorization.

39669884649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302 (or 9296 counting only the distinct ones).

The product of its digits is 483729408, while the sum is 72.

The spelling of 39669884649 in words is "thirty-nine billion, six hundred sixty-nine million, eight hundred eighty-four thousand, six hundred forty-nine".