165045125451556 has 48 divisors (see below), whose sum is σ = 349508556633600. Its totient is φ = 66572589017088.

The previous prime is 165045125451553. The next prime is 165045125451637. The reversal of 165045125451556 is 655154521540561.

It is a super-2 number, since 2×165045125451556² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165045125451497 and 165045125451506.

It is not an unprimeable number, because it can be changed into a prime (165045125451553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212593500 + ... + 213368428.

It is an arithmetic number, because the mean of its divisors is an integer number (7281428263200).

Almost surely, 2^{165045125451556} is an apocalyptic number.

It is an amenable number.

165045125451556 is an abundant number, since it is smaller than the sum of its proper divisors (184463431182044).

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

165045125451556 is a wasteful number, since it uses less digits than its factorization.

165045125451556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222396 (or 1222394 counting only the distinct ones).

The product of its (nonzero) digits is 18000000, while the sum is 55.

The spelling of 165045125451556 in words is "one hundred sixty-five trillion, forty-five billion, one hundred twenty-five million, four hundred fifty-one thousand, five hundred fifty-six".