1311434651426 has 4 divisors (see below), whose sum is σ = 1967151977142. Its totient is φ = 655717325712.

The previous prime is 1311434651419. The next prime is 1311434651473. The reversal of 1311434651426 is 6241564341131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1001202361201 + 310232290225 = 1000601^2 + 556985^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327858662855 + ... + 327858662858.

Almost surely, 2^{1311434651426} is an apocalyptic number.

1311434651426 is a deficient number, since it is larger than the sum of its proper divisors (655717325716).

1311434651426 is an equidigital number, since it uses as much as digits as its factorization.

1311434651426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655717325715.

The product of its digits is 207360, while the sum is 41.

Adding to 1311434651426 its reverse (6241564341131), we get a palindrome (7552998992557).

The spelling of 1311434651426 in words is "one trillion, three hundred eleven billion, four hundred thirty-four million, six hundred fifty-one thousand, four hundred twenty-six".