38638405735939 has 2 divisors, whose sum is σ = 38638405735940. Its totient is φ = 38638405735938.

The previous prime is 38638405735931. The next prime is 38638405735981. The reversal of 38638405735939 is 93953750483683.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38638405735939 - 2³ = 38638405735931 is a prime.

It is not a weakly prime, because it can be changed into another prime (38638405735931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19319202867969 + 19319202867970.

It is an arithmetic number, because the mean of its divisors is an integer number (19319202867970).

Almost surely, 2^{38638405735939} is an apocalyptic number.

38638405735939 is a deficient number, since it is larger than the sum of its proper divisors (1).

38638405735939 is an equidigital number, since it uses as much as digits as its factorization.

38638405735939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1763596800, while the sum is 73.

The spelling of 38638405735939 in words is "thirty-eight trillion, six hundred thirty-eight billion, four hundred five million, seven hundred thirty-five thousand, nine hundred thirty-nine".