39981394152 has 512 divisors, whose sum is σ = 136249344000. Its totient is φ = 10622949120.

The previous prime is 39981394147. The next prime is 39981394207. The reversal of 39981394152 is 25149318993.

39981394152 is a `hidden beast` number, since 3 + 9 + 98 + 139 + 415 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 167286049 + ... + 167286287.

It is an arithmetic number, because the mean of its divisors is an integer number (266112000).

Almost surely, 2^39981394152 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 39981394152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68124672000).

39981394152 is an abundant number, since it is smaller than the sum of its proper divisors (96267949848).

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

39981394152 is a wasteful number, since it uses less digits than its factorization.

39981394152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 408 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The spelling of 39981394152 in words is "thirty-nine billion, nine hundred eighty-one million, three hundred ninety-four thousand, one hundred fifty-two".