122660538565 has 4 divisors (see below), whose sum is σ = 147192646284. Its totient is φ = 98128430848.

The previous prime is 122660538551. The next prime is 122660538601. The reversal of 122660538565 is 565835066221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565835066221 = 19 ⋅29780792959.

It can be written as a sum of positive squares in 2 ways, for example, as 82401721249 + 40258817316 = 287057^2 + 200646^2 .

It is a cyclic number.

It is not a de Polignac number, because 122660538565 - 2⁷ = 122660538437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12266053852 + ... + 12266053861.

It is an arithmetic number, because the mean of its divisors is an integer number (36798161571).

Almost surely, 2^122660538565 is an apocalyptic number.

It is an amenable number.

122660538565 is a deficient number, since it is larger than the sum of its proper divisors (24532107719).

122660538565 is an equidigital number, since it uses as much as digits as its factorization.

122660538565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24532107718.

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 122660538565 in words is "one hundred twenty-two billion, six hundred sixty million, five hundred thirty-eight thousand, five hundred sixty-five".