38349651181 has 4 divisors (see below), whose sum is σ = 38352747132. Its totient is φ = 38346555232.

The previous prime is 38349651149. The next prime is 38349651191. The reversal of 38349651181 is 18115694383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18115694383 = 7129 ⋅2541127.

It can be written as a sum of positive squares in 2 ways, for example, as 14770513156 + 23579138025 = 121534^2 + 153555^2 .

It is a cyclic number.

It is not a de Polignac number, because 38349651181 - 2⁵ = 38349651149 is a prime.

It is a super-2 number, since 2×38349651181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38349651121) 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, 1529320 + ... + 1554193.

It is an arithmetic number, because the mean of its divisors is an integer number (9588186783).

Almost surely, 2^38349651181 is an apocalyptic number.

It is an amenable number.

38349651181 is a deficient number, since it is larger than the sum of its proper divisors (3095951).

38349651181 is a wasteful number, since it uses less digits than its factorization.

38349651181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095950.

The product of its digits is 622080, while the sum is 49.

The spelling of 38349651181 in words is "thirty-eight billion, three hundred forty-nine million, six hundred fifty-one thousand, one hundred eighty-one".