1101661540543 has 8 divisors (see below), whose sum is σ = 1106340222960. Its totient is φ = 1096988235840.

The previous prime is 1101661540439. The next prime is 1101661540583. The reversal of 1101661540543 is 3450451661011.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1101661540543 - 2¹³ = 1101661532351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101661540583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 933580 + ... + 1753537.

It is an arithmetic number, because the mean of its divisors is an integer number (138292527870).

Almost surely, 2^{1101661540543} is an apocalyptic number.

1101661540543 is a deficient number, since it is larger than the sum of its proper divisors (4678682417).

1101661540543 is a wasteful number, since it uses less digits than its factorization.

1101661540543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688857.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 1101661540543 in words is "one trillion, one hundred one billion, six hundred sixty-one million, five hundred forty thousand, five hundred forty-three".