38538181868429 has 2 divisors, whose sum is σ = 38538181868430. Its totient is φ = 38538181868428.

The previous prime is 38538181868411. The next prime is 38538181868539. The reversal of 38538181868429 is 92486818183583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32324080172329 + 6214101696100 = 5685427^2 + 2492810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38538181868429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38538181868029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19269090934214 + 19269090934215.

It is an arithmetic number, because the mean of its divisors is an integer number (19269090934215).

Almost surely, 2^{38538181868429} is an apocalyptic number.

It is an amenable number.

38538181868429 is a deficient number, since it is larger than the sum of its proper divisors (1).

38538181868429 is an equidigital number, since it uses as much as digits as its factorization.

38538181868429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 637009920, while the sum is 74.

The spelling of 38538181868429 in words is "thirty-eight trillion, five hundred thirty-eight billion, one hundred eighty-one million, eight hundred sixty-eight thousand, four hundred twenty-nine".