38394816671 has 4 divisors (see below), whose sum is σ = 39211727712. Its totient is φ = 37577905632.

The previous prime is 38394816653. The next prime is 38394816701. The reversal of 38394816671 is 17661849383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17661849383 = 937 ⋅18849359.

It is a cyclic number.

It is not a de Polignac number, because 38394816671 - 2¹⁴ = 38394800287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38394813671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408455450 + ... + 408455543.

It is an arithmetic number, because the mean of its divisors is an integer number (9802931928).

Almost surely, 2^38394816671 is an apocalyptic number.

38394816671 is a deficient number, since it is larger than the sum of its proper divisors (816911041).

38394816671 is an equidigital number, since it uses as much as digits as its factorization.

38394816671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816911040.

The product of its digits is 5225472, while the sum is 56.

The spelling of 38394816671 in words is "thirty-eight billion, three hundred ninety-four million, eight hundred sixteen thousand, six hundred seventy-one".