38403638369 has 2 divisors, whose sum is σ = 38403638370. Its totient is φ = 38403638368.

The previous prime is 38403638363. The next prime is 38403638459. The reversal of 38403638369 is 96383630483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38249580625 + 154057744 = 195575^2 + 12412^2 .

It is a cyclic number.

It is not a de Polignac number, because 38403638369 - 2⁸ = 38403638113 is a prime.

It is a super-2 number, since 2×38403638369² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38403638369.

It is not a weakly prime, because it can be changed into another prime (38403638363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19201819184 + 19201819185.

It is an arithmetic number, because the mean of its divisors is an integer number (19201819185).

Almost surely, 2^38403638369 is an apocalyptic number.

It is an amenable number.

38403638369 is a deficient number, since it is larger than the sum of its proper divisors (1).

38403638369 is an equidigital number, since it uses as much as digits as its factorization.

38403638369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 53.

The spelling of 38403638369 in words is "thirty-eight billion, four hundred three million, six hundred thirty-eight thousand, three hundred sixty-nine".