221647657024065 has 16 divisors (see below), whose sum is σ = 361327501263168. Its totient is φ = 115981667071296.

The previous prime is 221647657023943. The next prime is 221647657024093. The reversal of 221647657024065 is 560420756746122.

It is a happy number.

It is not a de Polignac number, because 221647657024065 - 2¹⁰ = 221647657023041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221647657023996 and 221647657024014.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139401041359 + ... + 139401042948.

It is an arithmetic number, because the mean of its divisors is an integer number (22582968828948).

Almost surely, 2^{221647657024065} is an apocalyptic number.

It is an amenable number.

221647657024065 is a deficient number, since it is larger than the sum of its proper divisors (139679844239103).

221647657024065 is a wasteful number, since it uses less digits than its factorization.

221647657024065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278802084368.

The product of its (nonzero) digits is 33868800, while the sum is 57.

The spelling of 221647657024065 in words is "two hundred twenty-one trillion, six hundred forty-seven billion, six hundred fifty-seven million, twenty-four thousand, sixty-five".