1311643632343 has 32 divisors (see below), whose sum is σ = 1455489826560. Its totient is φ = 1172017693440.

The previous prime is 1311643632331. The next prime is 1311643632389. The reversal of 1311643632343 is 3432363461131.

It is not a de Polignac number, because 1311643632343 - 2¹⁷ = 1311643501271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311643632296 and 1311643632305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311643632043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 488870680 + ... + 488873362.

It is an arithmetic number, because the mean of its divisors is an integer number (45484057080).

Almost surely, 2^{1311643632343} is an apocalyptic number.

1311643632343 is a deficient number, since it is larger than the sum of its proper divisors (143846194217).

1311643632343 is a wasteful number, since it uses less digits than its factorization.

1311643632343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639.

The product of its digits is 279936, while the sum is 40.

The spelling of 1311643632343 in words is "one trillion, three hundred eleven billion, six hundred forty-three million, six hundred thirty-two thousand, three hundred forty-three".