221655704001604 has 24 divisors (see below), whose sum is σ = 392094453975840. Its totient is φ = 109629871838976.

The previous prime is 221655704001533. The next prime is 221655704001629. The reversal of 221655704001604 is 406100407556122.

It is a super-2 number, since 2×221655704001604² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143567062 + ... + 145102765.

It is an arithmetic number, because the mean of its divisors is an integer number (16337268915660).

Almost surely, 2^{221655704001604} is an apocalyptic number.

It is an amenable number.

221655704001604 is a deficient number, since it is larger than the sum of its proper divisors (170438749974236).

221655704001604 is a wasteful number, since it uses less digits than its factorization.

221655704001604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288671907 (or 288671905 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 221655704001604 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, seven hundred four million, one thousand, six hundred four".