38645333181 has 144 divisors (see below), whose sum is σ = 76437623808. Its totient is φ = 18564940800.

The previous prime is 38645333159. The next prime is 38645333189. The reversal of 38645333181 is 18133354683.

38645333181 is a `hidden beast` number, since 3 + 8 + 6 + 4 + 533 + 31 + 81 = 666.

It is not a de Polignac number, because 38645333181 - 2⁵ = 38645333149 is a prime.

It is a super-2 number, since 2×38645333181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38645333189) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3014896 + ... + 3027686.

It is an arithmetic number, because the mean of its divisors is an integer number (530816832).

Almost surely, 2^38645333181 is an apocalyptic number.

38645333181 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

38645333181 is a deficient number, since it is larger than the sum of its proper divisors (37792290627).

38645333181 is a wasteful number, since it uses less digits than its factorization.

38645333181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12872 (or 12862 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 38645333181 in words is "thirty-eight billion, six hundred forty-five million, three hundred thirty-three thousand, one hundred eighty-one".