38565636864 has 144 divisors (see below), whose sum is σ = 104924897280. Its totient is φ = 12572098560.

The previous prime is 38565636853. The next prime is 38565636871. The reversal of 38565636864 is 46863656583.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 38565636798 and 38565636807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6922272 + ... + 6927840.

It is an arithmetic number, because the mean of its divisors is an integer number (728645120).

Almost surely, 2^38565636864 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 38565636864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52462448640).

38565636864 is an abundant number, since it is smaller than the sum of its proper divisors (66359260416).

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

38565636864 is a wasteful number, since it uses less digits than its factorization.

38565636864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5786 (or 5772 counting only the distinct ones).

The product of its digits is 74649600, while the sum is 60.

The spelling of 38565636864 in words is "thirty-eight billion, five hundred sixty-five million, six hundred thirty-six thousand, eight hundred sixty-four".