38717228635649 has 2 divisors, whose sum is σ = 38717228635650. Its totient is φ = 38717228635648.

The previous prime is 38717228635637. The next prime is 38717228635711. The reversal of 38717228635649 is 94653682271783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31937417742400 + 6779810893249 = 5651320^2 + 2603807^2 .

It is a cyclic number.

It is not a de Polignac number, because 38717228635649 - 2¹⁶ = 38717228570113 is a prime.

It is not a weakly prime, because it can be changed into another prime (38717228634649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19358614317824 + 19358614317825.

It is an arithmetic number, because the mean of its divisors is an integer number (19358614317825).

Almost surely, 2^{38717228635649} is an apocalyptic number.

It is an amenable number.

38717228635649 is a deficient number, since it is larger than the sum of its proper divisors (1).

38717228635649 is an equidigital number, since it uses as much as digits as its factorization.

38717228635649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 731566080, while the sum is 71.

The spelling of 38717228635649 in words is "thirty-eight trillion, seven hundred seventeen billion, two hundred twenty-eight million, six hundred thirty-five thousand, six hundred forty-nine".