1353221165543 has 8 divisors (see below), whose sum is σ = 1479066073968. Its totient is φ = 1230483538944.

The previous prime is 1353221165537. The next prime is 1353221165563. The reversal of 1353221165543 is 3455611223531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1353221165543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1353221165543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353221165563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776819546 + ... + 776821287.

It is an arithmetic number, because the mean of its divisors is an integer number (184883259246).

Almost surely, 2^{1353221165543} is an apocalyptic number.

1353221165543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1353221165543 is a deficient number, since it is larger than the sum of its proper divisors (125844908425).

1353221165543 is a wasteful number, since it uses less digits than its factorization.

1353221165543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553640913.

The product of its digits is 324000, while the sum is 41.

The spelling of 1353221165543 in words is "one trillion, three hundred fifty-three billion, two hundred twenty-one million, one hundred sixty-five thousand, five hundred forty-three".