38636618641 has 8 divisors (see below), whose sum is σ = 40992688224. Its totient is φ = 36289807680.

The previous prime is 38636618639. The next prime is 38636618821. The reversal of 38636618641 is 14681663683.

38636618641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38636618641 - 2¹ = 38636618639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38636618611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2306055 + ... + 2322748.

It is an arithmetic number, because the mean of its divisors is an integer number (5124086028).

Almost surely, 2^38636618641 is an apocalyptic number.

It is an amenable number.

38636618641 is a deficient number, since it is larger than the sum of its proper divisors (2356069583).

38636618641 is a wasteful number, since it uses less digits than its factorization.

38636618641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4629311.

The product of its digits is 2985984, while the sum is 52.

The spelling of 38636618641 in words is "thirty-eight billion, six hundred thirty-six million, six hundred eighteen thousand, six hundred forty-one".