321055105545 has 32 divisors (see below), whose sum is σ = 578803587840. Its totient is φ = 168817703040.

The previous prime is 321055105537. The next prime is 321055105577. The reversal of 321055105545 is 545501550123.

321055105545 is a `hidden beast` number, since 3 + 2 + 1 + 0 + 5 + 5 + 105 + 545 = 666.

It is not a de Polignac number, because 321055105545 - 2³ = 321055105537 is a prime.

It is a super-2 number, since 2×321055105545² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16738204 + ... + 16757373.

It is an arithmetic number, because the mean of its divisors is an integer number (18087612120).

Almost surely, 2^321055105545 is an apocalyptic number.

It is an amenable number.

321055105545 is a deficient number, since it is larger than the sum of its proper divisors (257748482295).

321055105545 is a wasteful number, since it uses less digits than its factorization.

321055105545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33495662 (or 33495656 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

Adding to 321055105545 its reverse (545501550123), we get a palindrome (866556655668).

The spelling of 321055105545 in words is "three hundred twenty-one billion, fifty-five million, one hundred five thousand, five hundred forty-five".