54206989091 has 4 divisors (see below), whose sum is σ = 54336361800. Its totient is φ = 54077616384.

The previous prime is 54206989043. The next prime is 54206989127. The reversal of 54206989091 is 19098960245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19098960245 = 5 ⋅3819792049.

It is a cyclic number.

It is not a de Polignac number, because 54206989091 - 2⁶ = 54206989027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54206979091) 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 3 ways as a sum of consecutive naturals, for example, 64685726 + ... + 64686563.

It is an arithmetic number, because the mean of its divisors is an integer number (13584090450).

Almost surely, 2^54206989091 is an apocalyptic number.

54206989091 is a deficient number, since it is larger than the sum of its proper divisors (129372709).

54206989091 is a wasteful number, since it uses less digits than its factorization.

54206989091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129372708.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 54206989091 in words is "fifty-four billion, two hundred six million, nine hundred eighty-nine thousand, ninety-one".