165618231113228 has 24 divisors (see below), whose sum is σ = 291689520200400. Its totient is φ = 82278409981248.

The previous prime is 165618231113197. The next prime is 165618231113239. The reversal of 165618231113228 is 822311132816561.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10683983 + ... + 21104121.

It is an arithmetic number, because the mean of its divisors is an integer number (12153730008350).

Almost surely, 2^{165618231113228} is an apocalyptic number.

It is an amenable number.

165618231113228 is a deficient number, since it is larger than the sum of its proper divisors (126071289087172).

165618231113228 is a wasteful number, since it uses less digits than its factorization.

165618231113228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10445609 (or 10445607 counting only the distinct ones).

The product of its digits is 829440, while the sum is 50.

Adding to 165618231113228 its reverse (822311132816561), we get a palindrome (987929363929789).

The spelling of 165618231113228 in words is "one hundred sixty-five trillion, six hundred eighteen billion, two hundred thirty-one million, one hundred thirteen thousand, two hundred twenty-eight".