1311643454352 has 80 divisors (see below), whose sum is σ = 4224513994752. Its totient is φ = 340686610560.

The previous prime is 1311643454281. The next prime is 1311643454353. The reversal of 1311643454352 is 2534543461131.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1311643454353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177437248 + ... + 177444639.

Almost surely, 2^{1311643454352} is an apocalyptic number.

1311643454352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311643454352 is an abundant number, since it is smaller than the sum of its proper divisors (2912870540400).

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

1311643454352 is a wasteful number, since it uses less digits than its factorization.

1311643454352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354881916 (or 354881910 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 1311643454352 in words is "one trillion, three hundred eleven billion, six hundred forty-three million, four hundred fifty-four thousand, three hundred fifty-two".