54393648472821 has 24 divisors (see below), whose sum is σ = 84527589222144. Its totient is φ = 31022426285760.

The previous prime is 54393648472819. The next prime is 54393648472831. The reversal of 54393648472821 is 12827484639345.

It is not a de Polignac number, because 54393648472821 - 2¹ = 54393648472819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54393648472831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355033605 + ... + 355186778.

It is an arithmetic number, because the mean of its divisors is an integer number (3521982884256).

Almost surely, 2^{54393648472821} is an apocalyptic number.

It is an amenable number.

54393648472821 is a deficient number, since it is larger than the sum of its proper divisors (30133940749323).

54393648472821 is a wasteful number, since it uses less digits than its factorization.

54393648472821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710220921 (or 710220914 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 66.

The spelling of 54393648472821 in words is "fifty-four trillion, three hundred ninety-three billion, six hundred forty-eight million, four hundred seventy-two thousand, eight hundred twenty-one".