38181350181 has 12 divisors (see below), whose sum is σ = 55125737088. Its totient is φ = 23496215184.

The previous prime is 38181350177. The next prime is 38181350197. The reversal of 38181350181 is 18105318183.

It is a happy number.

It is not a de Polignac number, because 38181350181 - 2² = 38181350177 is a prime.

It is a super-2 number, since 2×38181350181² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38181350111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37653685 + ... + 37654698.

It is an arithmetic number, because the mean of its divisors is an integer number (4593811424).

Almost surely, 2^38181350181 is an apocalyptic number.

It is an amenable number.

38181350181 is a deficient number, since it is larger than the sum of its proper divisors (16944386907).

38181350181 is a wasteful number, since it uses less digits than its factorization.

38181350181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75308412 (or 75308399 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

The spelling of 38181350181 in words is "thirty-eight billion, one hundred eighty-one million, three hundred fifty thousand, one hundred eighty-one".