39145138930181 has 2 divisors, whose sum is σ = 39145138930182. Its totient is φ = 39145138930180.

The previous prime is 39145138930169. The next prime is 39145138930201. The reversal of 39145138930181 is 18103983154193.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27174639184900 + 11970499745281 = 5212930^2 + 3459841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39145138930181 is a prime.

It is a super-2 number, since 2×39145138930181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39145138930981) 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 as a sum of consecutive naturals, namely, 19572569465090 + 19572569465091.

It is an arithmetic number, because the mean of its divisors is an integer number (19572569465091).

Almost surely, 2^{39145138930181} is an apocalyptic number.

It is an amenable number.

39145138930181 is a deficient number, since it is larger than the sum of its proper divisors (1).

39145138930181 is an equidigital number, since it uses as much as digits as its factorization.

39145138930181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The spelling of 39145138930181 in words is "thirty-nine trillion, one hundred forty-five billion, one hundred thirty-eight million, nine hundred thirty thousand, one hundred eighty-one".