122563665561 has 8 divisors (see below), whose sum is σ = 168689776384. Its totient is φ = 79073332560.

The previous prime is 122563665557. The next prime is 122563665563. The reversal of 122563665561 is 165566365221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122563665561 - 2² = 122563665557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122563665561.

It is not an unprimeable number, because it can be changed into a prime (122563665563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658944346 + ... + 658944531.

It is an arithmetic number, because the mean of its divisors is an integer number (21086222048).

Almost surely, 2^122563665561 is an apocalyptic number.

It is an amenable number.

122563665561 is a deficient number, since it is larger than the sum of its proper divisors (46126110823).

122563665561 is a wasteful number, since it uses less digits than its factorization.

122563665561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317888911.

The product of its digits is 1944000, while the sum is 48.

The spelling of 122563665561 in words is "one hundred twenty-two billion, five hundred sixty-three million, six hundred sixty-five thousand, five hundred sixty-one".