39638155648 has 256 divisors, whose sum is σ = 101907792000. Its totient is φ = 15249088512.

The previous prime is 39638155619. The next prime is 39638155649. The reversal of 39638155648 is 84655183693.

It is a junction number, because it is equal to n+sod(n) for n = 39638155592 and 39638155601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39638155649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21116886 + ... + 21118762.

Almost surely, 2^39638155648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39638155648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50953896000).

39638155648 is an abundant number, since it is smaller than the sum of its proper divisors (62269636352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39638155648 is a wasteful number, since it uses less digits than its factorization.

39638155648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962 (or 1936 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 58.

The spelling of 39638155648 in words is "thirty-nine billion, six hundred thirty-eight million, one hundred fifty-five thousand, six hundred forty-eight".