122551621653 has 8 divisors (see below), whose sum is σ = 163516997248. Its totient is φ = 81643663584.

The previous prime is 122551621651. The next prime is 122551621771. The reversal of 122551621653 is 356126155221.

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

It is not a de Polignac number, because 122551621653 - 2¹ = 122551621651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122551621651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14349400 + ... + 14357937.

It is an arithmetic number, because the mean of its divisors is an integer number (20439624656).

Almost surely, 2^122551621653 is an apocalyptic number.

It is an amenable number.

122551621653 is a deficient number, since it is larger than the sum of its proper divisors (40965375595).

122551621653 is a wasteful number, since it uses less digits than its factorization.

122551621653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28708763.

The product of its digits is 108000, while the sum is 39.

Adding to 122551621653 its reverse (356126155221), we get a palindrome (478677776874).

The spelling of 122551621653 in words is "one hundred twenty-two billion, five hundred fifty-one million, six hundred twenty-one thousand, six hundred fifty-three".