54321540509509 has 48 divisors (see below), whose sum is σ = 68708979839808. Its totient is φ = 42564471038208.

The previous prime is 54321540509479. The next prime is 54321540509527. The reversal of 54321540509509 is 90590504512345.

It is not a de Polignac number, because 54321540509509 - 2¹⁵ = 54321540476741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54321540509209) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217097697 + ... + 217347769.

It is an arithmetic number, because the mean of its divisors is an integer number (1431437079996).

Almost surely, 2^{54321540509509} is an apocalyptic number.

It is an amenable number.

54321540509509 is a deficient number, since it is larger than the sum of its proper divisors (14387439330299).

54321540509509 is a wasteful number, since it uses less digits than its factorization.

54321540509509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253394 (or 253387 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 54321540509509 in words is "fifty-four trillion, three hundred twenty-one billion, five hundred forty million, five hundred nine thousand, five hundred nine".