39855217811136 has 336 divisors, whose sum is σ = 136363913118720. Its totient is φ = 10172192163840.

The previous prime is 39855217811119. The next prime is 39855217811173. The reversal of 39855217811136 is 63111871255893.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-2 number, since 2×39855217811136² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39855217811136.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1464546 + ... + 9047393.

It is an arithmetic number, because the mean of its divisors is an integer number (405844979520).

Almost surely, 2^{39855217811136} 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 39855217811136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68181956559360).

39855217811136 is an abundant number, since it is smaller than the sum of its proper divisors (96508695307584).

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

39855217811136 is a wasteful number, since it uses less digits than its factorization.

39855217811136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10512012 (or 10511995 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 60.

The spelling of 39855217811136 in words is "thirty-nine trillion, eight hundred fifty-five billion, two hundred seventeen million, eight hundred eleven thousand, one hundred thirty-six".