39961838020648 has 16 divisors (see below), whose sum is σ = 74929740209280. Its totient is φ = 19980573964848.

The previous prime is 39961838020631. The next prime is 39961838020649. The reversal of 39961838020648 is 84602083816993.

It is not an unprimeable number, because it can be changed into a prime (39961838020649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42638136 + ... + 43565287.

It is an arithmetic number, because the mean of its divisors is an integer number (4683108763080).

Almost surely, 2^{39961838020648} is an apocalyptic number.

It is an amenable number.

39961838020648 is a deficient number, since it is larger than the sum of its proper divisors (34967902188632).

39961838020648 is a wasteful number, since it uses less digits than its factorization.

39961838020648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86261376 (or 86261372 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 67.

The spelling of 39961838020648 in words is "thirty-nine trillion, nine hundred sixty-one billion, eight hundred thirty-eight million, twenty thousand, six hundred forty-eight".