1406113526509 has 2 divisors, whose sum is σ = 1406113526510. Its totient is φ = 1406113526508.

The previous prime is 1406113526507. The next prime is 1406113526651. The reversal of 1406113526509 is 9056253116041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 909835545609 + 496277980900 = 953853^2 + 704470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406113526509 - 2¹ = 1406113526507 is a prime.

Together with 1406113526507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1406113526507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703056763254 + 703056763255.

It is an arithmetic number, because the mean of its divisors is an integer number (703056763255).

Almost surely, 2^{1406113526509} is an apocalyptic number.

It is an amenable number.

1406113526509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406113526509 is an equidigital number, since it uses as much as digits as its factorization.

1406113526509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 1406113526509 in words is "one trillion, four hundred six billion, one hundred thirteen million, five hundred twenty-six thousand, five hundred nine".