221690429604 has 120 divisors (see below), whose sum is σ = 668765505408. Its totient is φ = 62725104000.

The previous prime is 221690429599. The next prime is 221690429647. The reversal of 221690429604 is 406924096122.

221690429604 is a `hidden beast` number, since 2 + 2 + 16 + 9 + 0 + 4 + 29 + 604 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 221690429604.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 240897 + ... + 708104.

Almost surely, 2^221690429604 is an apocalyptic number.

It is an amenable number.

221690429604 is an abundant number, since it is smaller than the sum of its proper divisors (447075075804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221690429604 is a wasteful number, since it uses less digits than its factorization.

221690429604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949127 (or 949116 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 221690429604 in words is "two hundred twenty-one billion, six hundred ninety million, four hundred twenty-nine thousand, six hundred four".