38721486978719 has 2 divisors, whose sum is σ = 38721486978720. Its totient is φ = 38721486978718.

The previous prime is 38721486978683. The next prime is 38721486978787. The reversal of 38721486978719 is 91787968412783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38721486978719 - 2¹⁶ = 38721486913183 is a prime.

It is a super-2 number, since 2×38721486978719² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38721485978719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19360743489359 + 19360743489360.

It is an arithmetic number, because the mean of its divisors is an integer number (19360743489360).

Almost surely, 2^{38721486978719} is an apocalyptic number.

38721486978719 is a deficient number, since it is larger than the sum of its proper divisors (1).

38721486978719 is an equidigital number, since it uses as much as digits as its factorization.

38721486978719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048385024, while the sum is 80.

The spelling of 38721486978719 in words is "thirty-eight trillion, seven hundred twenty-one billion, four hundred eighty-six million, nine hundred seventy-eight thousand, seven hundred nineteen".