54440520421 has 12 divisors (see below), whose sum is σ = 63889206732. Its totient is φ = 46250348928.

The previous prime is 54440520391. The next prime is 54440520437. The reversal of 54440520421 is 12402504445.

It can be written as a sum of positive squares in 2 ways, for example, as 1128019396 + 53312501025 = 33586^2 + 230895^2 .

It is not a de Polignac number, because 54440520421 - 2¹⁷ = 54440389349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54440520481) 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 11 ways as a sum of consecutive naturals, for example, 4910530 + ... + 4921603.

It is an arithmetic number, because the mean of its divisors is an integer number (5324100561).

Almost surely, 2^54440520421 is an apocalyptic number.

It is an amenable number.

54440520421 is a deficient number, since it is larger than the sum of its proper divisors (9448686311).

54440520421 is a wasteful number, since it uses less digits than its factorization.

54440520421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9832260 (or 9832253 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

The spelling of 54440520421 in words is "fifty-four billion, four hundred forty million, five hundred twenty thousand, four hundred twenty-one".