1228171848539 has 2 divisors, whose sum is σ = 1228171848540. Its totient is φ = 1228171848538.

The previous prime is 1228171848517. The next prime is 1228171848583. The reversal of 1228171848539 is 9358481718221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1228171848539 - 2²⁰ = 1228170799963 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1228171898539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614085924269 + 614085924270.

It is an arithmetic number, because the mean of its divisors is an integer number (614085924270).

Almost surely, 2^{1228171848539} is an apocalyptic number.

1228171848539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1228171848539 is an equidigital number, since it uses as much as digits as its factorization.

1228171848539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 59.

The spelling of 1228171848539 in words is "one trillion, two hundred twenty-eight billion, one hundred seventy-one million, eight hundred forty-eight thousand, five hundred thirty-nine".