15336788491421 has 2 divisors, whose sum is σ = 15336788491422. Its totient is φ = 15336788491420.

The previous prime is 15336788491397. The next prime is 15336788491441. The reversal of 15336788491421 is 12419488763351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14833944408196 + 502844083225 = 3851486^2 + 709115^2 .

It is a cyclic number.

It is not a de Polignac number, because 15336788491421 - 2³⁸ = 15061910584477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15336788491441) 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, 7668394245710 + 7668394245711.

It is an arithmetic number, because the mean of its divisors is an integer number (7668394245711).

Almost surely, 2^{15336788491421} is an apocalyptic number.

It is an amenable number.

15336788491421 is a deficient number, since it is larger than the sum of its proper divisors (1).

15336788491421 is an equidigital number, since it uses as much as digits as its factorization.

15336788491421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34836480, while the sum is 62.

The spelling of 15336788491421 in words is "fifteen trillion, three hundred thirty-six billion, seven hundred eighty-eight million, four hundred ninety-one thousand, four hundred twenty-one".