15721367848133 has 2 divisors, whose sum is σ = 15721367848134. Its totient is φ = 15721367848132.

The previous prime is 15721367848111. The next prime is 15721367848157. The reversal of 15721367848133 is 33184876312751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13516968430849 + 2204399417284 = 3676543^2 + 1484722^2 .

It is a cyclic number.

It is not a de Polignac number, because 15721367848133 - 2⁸ = 15721367847877 is a prime.

It is a super-2 number, since 2×15721367848133² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15721367841133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7860683924066 + 7860683924067.

It is an arithmetic number, because the mean of its divisors is an integer number (7860683924067).

Almost surely, 2^{15721367848133} is an apocalyptic number.

It is an amenable number.

15721367848133 is a deficient number, since it is larger than the sum of its proper divisors (1).

15721367848133 is an equidigital number, since it uses as much as digits as its factorization.

15721367848133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 59.

The spelling of 15721367848133 in words is "fifteen trillion, seven hundred twenty-one billion, three hundred sixty-seven million, eight hundred forty-eight thousand, one hundred thirty-three".