13542205309 has 2 divisors, whose sum is σ = 13542205310. Its totient is φ = 13542205308.

The previous prime is 13542205283. The next prime is 13542205361. The reversal of 13542205309 is 90350224531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13457160025 + 85045284 = 116005^2 + 9222^2 .

It is a cyclic number.

It is not a de Polignac number, because 13542205309 - 2²¹ = 13540108157 is a prime.

It is a super-2 number, since 2×13542205309² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13542205009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6771102654 + 6771102655.

It is an arithmetic number, because the mean of its divisors is an integer number (6771102655).

Almost surely, 2^13542205309 is an apocalyptic number.

It is an amenable number.

13542205309 is a deficient number, since it is larger than the sum of its proper divisors (1).

13542205309 is an equidigital number, since it uses as much as digits as its factorization.

13542205309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 13542205309 in words is "thirteen billion, five hundred forty-two million, two hundred five thousand, three hundred nine".