38639881121 has 2 divisors, whose sum is σ = 38639881122. Its totient is φ = 38639881120.

The previous prime is 38639881103. The next prime is 38639881127. The reversal of 38639881121 is 12118893683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38000044096 + 639837025 = 194936^2 + 25295^2 .

It is a cyclic number.

It is not a de Polignac number, because 38639881121 - 2²⁶ = 38572772257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38639881121.

It is not a weakly prime, because it can be changed into another prime (38639881127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19319940560 + 19319940561.

It is an arithmetic number, because the mean of its divisors is an integer number (19319940561).

Almost surely, 2^38639881121 is an apocalyptic number.

It is an amenable number.

38639881121 is a deficient number, since it is larger than the sum of its proper divisors (1).

38639881121 is an equidigital number, since it uses as much as digits as its factorization.

38639881121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The spelling of 38639881121 in words is "thirty-eight billion, six hundred thirty-nine million, eight hundred eighty-one thousand, one hundred twenty-one".