122553606565 has 16 divisors (see below), whose sum is σ = 158744468736. Its totient is φ = 90291124800.

The previous prime is 122553606559. The next prime is 122553606587. The reversal of 122553606565 is 565606355221.

It is a happy number.

It is not a de Polignac number, because 122553606565 - 2¹⁵ = 122553573797 is a prime.

It is a super-2 number, since 2×122553606565² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 2159271 + ... + 2215300.

It is an arithmetic number, because the mean of its divisors is an integer number (9921529296).

Almost surely, 2^122553606565 is an apocalyptic number.

It is an amenable number.

122553606565 is a deficient number, since it is larger than the sum of its proper divisors (36190862171).

122553606565 is a wasteful number, since it uses less digits than its factorization.

122553606565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4375020.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 122553606565 in words is "one hundred twenty-two billion, five hundred fifty-three million, six hundred six thousand, five hundred sixty-five".