1365563120643 has 12 divisors (see below), whose sum is σ = 1973590091928. Its totient is φ = 909863092800.

The previous prime is 1365563120611. The next prime is 1365563120683. The reversal of 1365563120643 is 3460213655631.

1365563120643 is a `hidden beast` number, since 1 + 3 + 6 + 5 + 5 + 631 + 2 + 0 + 6 + 4 + 3 = 666.

It is not a de Polignac number, because 1365563120643 - 2⁵ = 1365563120611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1365563120683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42676533 + ... + 42708518.

It is an arithmetic number, because the mean of its divisors is an integer number (164465840994).

Almost surely, 2^{1365563120643} is an apocalyptic number.

1365563120643 is a deficient number, since it is larger than the sum of its proper divisors (608026971285).

1365563120643 is a wasteful number, since it uses less digits than its factorization.

1365563120643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85386834 (or 85386831 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 1365563120643 in words is "one trillion, three hundred sixty-five billion, five hundred sixty-three million, one hundred twenty thousand, six hundred forty-three".