221647064500156 has 6 divisors (see below), whose sum is σ = 387882362875280. Its totient is φ = 110823532250076.

The previous prime is 221647064500117. The next prime is 221647064500219. The reversal of 221647064500156 is 651005460746122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27705883062516 + ... + 27705883062523.

Almost surely, 2^{221647064500156} is an apocalyptic number.

It is an amenable number.

221647064500156 is a deficient number, since it is larger than the sum of its proper divisors (166235298375124).

221647064500156 is a wasteful number, since it uses less digits than its factorization.

221647064500156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55411766125043 (or 55411766125041 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 221647064500156 in words is "two hundred twenty-one trillion, six hundred forty-seven billion, sixty-four million, five hundred thousand, one hundred fifty-six".