11215546664543 has 12 divisors (see below), whose sum is σ = 12151702257408. Its totient is φ = 10346796457920.

The previous prime is 11215546664537. The next prime is 11215546664561. The reversal of 11215546664543 is 34546664551211.

It is not a de Polignac number, because 11215546664543 - 2¹⁶ = 11215546599007 is a prime.

It is a super-2 number, since 2×11215546664543² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215546664573) 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, 18989855 + ... + 19571552.

It is an arithmetic number, because the mean of its divisors is an integer number (1012641854784).

Almost surely, 2^{11215546664543} is an apocalyptic number.

11215546664543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11215546664543 is a deficient number, since it is larger than the sum of its proper divisors (936155592865).

11215546664543 is a wasteful number, since it uses less digits than its factorization.

11215546664543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38563154 (or 38563141 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 53.

The spelling of 11215546664543 in words is "eleven trillion, two hundred fifteen billion, five hundred forty-six million, six hundred sixty-four thousand, five hundred forty-three".