165620123364036 has 72 divisors (see below), whose sum is σ = 424822685913472. Its totient is φ = 50181959678400.

The previous prime is 165620123364029. The next prime is 165620123364077. The reversal of 165620123364036 is 630463321026561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5477286 + ... + 19006338.

Almost surely, 2^{165620123364036} is an apocalyptic number.

It is an amenable number.

165620123364036 is an abundant number, since it is smaller than the sum of its proper divisors (259202562549436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165620123364036 is a wasteful number, since it uses less digits than its factorization.

165620123364036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13537513 (or 13537500 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 165620123364036 in words is "one hundred sixty-five trillion, six hundred twenty billion, one hundred twenty-three million, three hundred sixty-four thousand, thirty-six".