545442423021 has 32 divisors (see below), whose sum is σ = 856171641600. Its totient is φ = 342008110080.

The previous prime is 545442423007. The next prime is 545442423041. The reversal of 545442423021 is 120324244545.

545442423021 is a `hidden beast` number, since 54 + 544 + 2 + 42 + 3 + 0 + 21 = 666.

It is not a de Polignac number, because 545442423021 - 2¹¹ = 545442420973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545442423041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284416 + ... + 1082486.

It is an arithmetic number, because the mean of its divisors is an integer number (26755363800).

Almost surely, 2^545442423021 is an apocalyptic number.

545442423021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

545442423021 is a deficient number, since it is larger than the sum of its proper divisors (310729218579).

545442423021 is a wasteful number, since it uses less digits than its factorization.

545442423021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799586 (or 799580 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 545442423021 its reverse (120324244545), we get a palindrome (665766667566).

The spelling of 545442423021 in words is "five hundred forty-five billion, four hundred forty-two million, four hundred twenty-three thousand, twenty-one".