12355122538 has 64 divisors (see below), whose sum is σ = 21941756928. Its totient is φ = 5155096320.

The previous prime is 12355122529. The next prime is 12355122553. The reversal of 12355122538 is 83522155321.

It is a super-2 number, since 2×12355122538² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12355122497 and 12355122506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2578581 + ... + 2583367.

It is an arithmetic number, because the mean of its divisors is an integer number (342839952).

Almost surely, 2^12355122538 is an apocalyptic number.

12355122538 is a deficient number, since it is larger than the sum of its proper divisors (9586634390).

12355122538 is a wasteful number, since it uses less digits than its factorization.

12355122538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987.

The product of its digits is 72000, while the sum is 37.

Adding to 12355122538 its reverse (83522155321), we get a palindrome (95877277859).

The spelling of 12355122538 in words is "twelve billion, three hundred fifty-five million, one hundred twenty-two thousand, five hundred thirty-eight".