38717743388491 has 2 divisors, whose sum is σ = 38717743388492. Its totient is φ = 38717743388490.

The previous prime is 38717743388461. The next prime is 38717743388497. The reversal of 38717743388491 is 19488334771783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38717743388491 - 2⁹ = 38717743387979 is a prime.

It is not a weakly prime, because it can be changed into another prime (38717743388497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19358871694245 + 19358871694246.

It is an arithmetic number, because the mean of its divisors is an integer number (19358871694246).

Almost surely, 2^{38717743388491} is an apocalyptic number.

38717743388491 is a deficient number, since it is larger than the sum of its proper divisors (1).

38717743388491 is an equidigital number, since it uses as much as digits as its factorization.

38717743388491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 682795008, while the sum is 73.

The spelling of 38717743388491 in words is "thirty-eight trillion, seven hundred seventeen billion, seven hundred forty-three million, three hundred eighty-eight thousand, four hundred ninety-one".