1311620405346 has 24 divisors (see below), whose sum is σ = 2842287047964. Its totient is φ = 437138673120.

The previous prime is 1311620405327. The next prime is 1311620405351. The reversal of 1311620405346 is 6435040261131.

1311620405346 is a `hidden beast` number, since 1 + 3 + 116 + 2 + 0 + 4 + 0 + 534 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1304906405625 + 6713999721 = 1142325^2 + 81939^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1311620405346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5558601 + ... + 5789756.

Almost surely, 2^{1311620405346} is an apocalyptic number.

1311620405346 is an abundant number, since it is smaller than the sum of its proper divisors (1530666642618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311620405346 is a wasteful number, since it uses less digits than its factorization.

1311620405346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11354786 (or 11354783 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 1311620405346 its reverse (6435040261131), we get a palindrome (7746660666477).

The spelling of 1311620405346 in words is "one trillion, three hundred eleven billion, six hundred twenty million, four hundred five thousand, three hundred forty-six".