38404870181 has 4 divisors (see below), whose sum is σ = 38451649164. Its totient is φ = 38358091200.

The previous prime is 38404870121. The next prime is 38404870213. The reversal of 38404870181 is 18107840483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18107840483 = 17713 ⋅1022291.

It can be written as a sum of positive squares in 2 ways, for example, as 27560980225 + 10843889956 = 166015^2 + 104134^2 .

It is a cyclic number.

It is not a de Polignac number, because 38404870181 - 2²² = 38400675877 is a prime.

It is a super-2 number, since 2×38404870181² (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 (38404870121) 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, 23388260 + ... + 23389901.

It is an arithmetic number, because the mean of its divisors is an integer number (9612912291).

Almost surely, 2^38404870181 is an apocalyptic number.

It is an amenable number.

38404870181 is a deficient number, since it is larger than the sum of its proper divisors (46778983).

38404870181 is an equidigital number, since it uses as much as digits as its factorization.

38404870181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46778982.

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 38404870181 in words is "thirty-eight billion, four hundred four million, eight hundred seventy thousand, one hundred eighty-one".