38987797663808 has 112 divisors (see below), whose sum is σ = 90882267108864. Its totient is φ = 16244244817920.

The previous prime is 38987797663753. The next prime is 38987797663819. The reversal of 38987797663808 is 80836679778983.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19449710 + ... + 21360402.

It is an arithmetic number, because the mean of its divisors is an integer number (811448813472).

Almost surely, 2^{38987797663808} 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 38987797663808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45441133554432).

38987797663808 is an abundant number, since it is smaller than the sum of its proper divisors (51894469445056).

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

38987797663808 is a wasteful number, since it uses less digits than its factorization.

38987797663808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911980 (or 1911970 counting only the distinct ones).

The product of its (nonzero) digits is 36870930432, while the sum is 89.

The spelling of 38987797663808 in words is "thirty-eight trillion, nine hundred eighty-seven billion, seven hundred ninety-seven million, six hundred sixty-three thousand, eight hundred eight".