553505445421 has 32 divisors (see below), whose sum is σ = 583423988832. Its totient is φ = 524566056960.

The previous prime is 553505445371. The next prime is 553505445461. The reversal of 553505445421 is 124544505355.

It can be written as a sum of positive squares in 16 ways, for example, as 1477249225 + 552028196196 = 38435^2 + 742986^2 .

It is a cyclic number.

It is not a de Polignac number, because 553505445421 - 2¹⁵ = 553505412653 is a prime.

It is a super-2 number, since 2×553505445421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553505445461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141306555 + ... + 141310471.

It is an arithmetic number, because the mean of its divisors is an integer number (18231999651).

Almost surely, 2^553505445421 is an apocalyptic number.

It is an amenable number.

553505445421 is a deficient number, since it is larger than the sum of its proper divisors (29918543411).

553505445421 is a wasteful number, since it uses less digits than its factorization.

553505445421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609.

The product of its (nonzero) digits is 1200000, while the sum is 43.

The spelling of 553505445421 in words is "five hundred fifty-three billion, five hundred five million, four hundred forty-five thousand, four hundred twenty-one".