54408076868521 has 16 divisors (see below), whose sum is σ = 57894062430528. Its totient is φ = 50953919385600.

The previous prime is 54408076868507. The next prime is 54408076868531. The reversal of 54408076868521 is 12586867080445.

It is a de Polignac number, because none of the positive numbers 2^k-54408076868521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54408076868531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15021001 + ... + 18287881.

It is an arithmetic number, because the mean of its divisors is an integer number (3618378901908).

Almost surely, 2^{54408076868521} is an apocalyptic number.

It is an amenable number.

54408076868521 is a deficient number, since it is larger than the sum of its proper divisors (3485985562007).

54408076868521 is a wasteful number, since it uses less digits than its factorization.

54408076868521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271752.

The product of its (nonzero) digits is 103219200, while the sum is 64.

The spelling of 54408076868521 in words is "fifty-four trillion, four hundred eight billion, seventy-six million, eight hundred sixty-eight thousand, five hundred twenty-one".