1311433420646 has 16 divisors (see below), whose sum is σ = 1971976945104. Its totient is φ = 654108353184.

The previous prime is 1311433420573. The next prime is 1311433420657. The reversal of 1311433420646 is 6460243341131.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 4462136 + ... + 4746948.

It is an arithmetic number, because the mean of its divisors is an integer number (123248559069).

Almost surely, 2^{1311433420646} is an apocalyptic number.

1311433420646 is a deficient number, since it is larger than the sum of its proper divisors (660543524458).

1311433420646 is a wasteful number, since it uses less digits than its factorization.

1311433420646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290455.

The product of its (nonzero) digits is 124416, while the sum is 38.

Adding to 1311433420646 its reverse (6460243341131), we get a palindrome (7771676761777).

The spelling of 1311433420646 in words is "one trillion, three hundred eleven billion, four hundred thirty-three million, four hundred twenty thousand, six hundred forty-six".