38611802161 has 4 divisors (see below), whose sum is σ = 40290576192. Its totient is φ = 36933028132.

The previous prime is 38611802113. The next prime is 38611802179. The reversal of 38611802161 is 16120811683.

38611802161 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16120811683 = 149 ⋅108193367.

It is a cyclic number.

It is not a de Polignac number, because 38611802161 - 2²³ = 38603413553 is a prime.

It is a super-2 number, since 2×38611802161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38611802161.

It is not an unprimeable number, because it can be changed into a prime (38611802191) 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, 839386981 + ... + 839387026.

It is an arithmetic number, because the mean of its divisors is an integer number (10072644048).

Almost surely, 2^38611802161 is an apocalyptic number.

It is an amenable number.

38611802161 is a deficient number, since it is larger than the sum of its proper divisors (1678774031).

38611802161 is a wasteful number, since it uses less digits than its factorization.

38611802161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678774030.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 38611802161 in words is "thirty-eight billion, six hundred eleven million, eight hundred two thousand, one hundred sixty-one".