39881791443648 has 896 divisors, whose sum is σ = 140809898557440. Its totient is φ = 9656672256000.

The previous prime is 39881791443601. The next prime is 39881791443691. The reversal of 39881791443648 is 84634419718893.

It is a self number, because there is not a number n which added to its sum of digits gives 39881791443648.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6153644568 + ... + 6153651048.

It is an arithmetic number, because the mean of its divisors is an integer number (157153904640).

Almost surely, 2^{39881791443648} 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 39881791443648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70404949278720).

39881791443648 is an abundant number, since it is smaller than the sum of its proper divisors (100928107113792).

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

39881791443648 is a wasteful number, since it uses less digits than its factorization.

39881791443648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037 (or 7027 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 75.

The spelling of 39881791443648 in words is "thirty-nine trillion, eight hundred eighty-one billion, seven hundred ninety-one million, four hundred forty-three thousand, six hundred forty-eight".