221604342056445 has 16 divisors (see below), whose sum is σ = 361256889693312. Its totient is φ = 115959001629120.

The previous prime is 221604342056381. The next prime is 221604342056467. The reversal of 221604342056445 is 544650243406122.

It is a happy number.

It is not a de Polignac number, because 221604342056445 - 2⁶ = 221604342056381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221604342056394 and 221604342056403.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 139373799241 + ... + 139373800830.

It is an arithmetic number, because the mean of its divisors is an integer number (22578555605832).

Almost surely, 2^{221604342056445} is an apocalyptic number.

It is an amenable number.

221604342056445 is a deficient number, since it is larger than the sum of its proper divisors (139652547636867).

221604342056445 is a wasteful number, since it uses less digits than its factorization.

221604342056445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278747600132.

The product of its (nonzero) digits is 5529600, while the sum is 48.

The spelling of 221604342056445 in words is "two hundred twenty-one trillion, six hundred four billion, three hundred forty-two million, fifty-six thousand, four hundred forty-five".