38638405736885 has 4 divisors (see below), whose sum is σ = 46366086884268. Its totient is φ = 30910724589504.

The previous prime is 38638405736809. The next prime is 38638405736963. The reversal of 38638405736885 is 58863750483683.

38638405736885 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9671857421521 + 28966548315364 = 3109961^2 + 5382058^2 .

It is a cyclic number.

It is not a de Polignac number, because 38638405736885 - 2²² = 38638401542581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3863840573684 + ... + 3863840573693.

It is an arithmetic number, because the mean of its divisors is an integer number (11591521721067).

Almost surely, 2^{38638405736885} is an apocalyptic number.

It is an amenable number.

38638405736885 is a deficient number, since it is larger than the sum of its proper divisors (7727681147383).

38638405736885 is an equidigital number, since it uses as much as digits as its factorization.

38638405736885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7727681147382.

The product of its (nonzero) digits is 2786918400, while the sum is 74.

The spelling of 38638405736885 in words is "thirty-eight trillion, six hundred thirty-eight billion, four hundred five million, seven hundred thirty-six thousand, eight hundred eighty-five".