38404137432949 has 2 divisors, whose sum is σ = 38404137432950. Its totient is φ = 38404137432948.

The previous prime is 38404137432893. The next prime is 38404137432953. The reversal of 38404137432949 is 94923473140483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37028016054225 + 1376121378724 = 6085065^2 + 1173082^2 .

It is a cyclic number.

It is not a de Polignac number, because 38404137432949 - 2¹⁷ = 38404137301877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38404137432979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19202068716474 + 19202068716475.

It is an arithmetic number, because the mean of its divisors is an integer number (19202068716475).

Almost surely, 2^{38404137432949} is an apocalyptic number.

It is an amenable number.

38404137432949 is a deficient number, since it is larger than the sum of its proper divisors (1).

38404137432949 is an equidigital number, since it uses as much as digits as its factorization.

38404137432949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62705664, while the sum is 61.

The spelling of 38404137432949 in words is "thirty-eight trillion, four hundred four billion, one hundred thirty-seven million, four hundred thirty-two thousand, nine hundred forty-nine".