1405698116909 has 2 divisors, whose sum is σ = 1405698116910. Its totient is φ = 1405698116908.

The previous prime is 1405698116897. The next prime is 1405698116947. The reversal of 1405698116909 is 9096118965041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1078800054409 + 326898062500 = 1038653^2 + 571750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405698116909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405698116209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702849058454 + 702849058455.

It is an arithmetic number, because the mean of its divisors is an integer number (702849058455).

Almost surely, 2^{1405698116909} is an apocalyptic number.

It is an amenable number.

1405698116909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405698116909 is an equidigital number, since it uses as much as digits as its factorization.

1405698116909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 59.

The spelling of 1405698116909 in words is "one trillion, four hundred five billion, six hundred ninety-eight million, one hundred sixteen thousand, nine hundred nine".