1216340340539 has 2 divisors, whose sum is σ = 1216340340540. Its totient is φ = 1216340340538.

The previous prime is 1216340340349. The next prime is 1216340340557. The reversal of 1216340340539 is 9350430436121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216340340539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216340340496 and 1216340340505.

It is not a weakly prime, because it can be changed into another prime (1216340360539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608170170269 + 608170170270.

It is an arithmetic number, because the mean of its divisors is an integer number (608170170270).

Almost surely, 2^{1216340340539} is an apocalyptic number.

1216340340539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216340340539 is an equidigital number, since it uses as much as digits as its factorization.

1216340340539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 1216340340539 in words is "one trillion, two hundred sixteen billion, three hundred forty million, three hundred forty thousand, five hundred thirty-nine".