165213014520556 has 24 divisors (see below), whose sum is σ = 301767077170944. Its totient is φ = 78995605479120.

The previous prime is 165213014520493. The next prime is 165213014520557. The reversal of 165213014520556 is 655025410312561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (165213014520557) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 219104640 + ... + 219857383.

It is an arithmetic number, because the mean of its divisors is an integer number (12573628215456).

Almost surely, 2^{165213014520556} is an apocalyptic number.

It is an amenable number.

165213014520556 is a deficient number, since it is larger than the sum of its proper divisors (136554062650388).

165213014520556 is a wasteful number, since it uses less digits than its factorization.

165213014520556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438966141 (or 438966139 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 165213014520556 in words is "one hundred sixty-five trillion, two hundred thirteen billion, fourteen million, five hundred twenty thousand, five hundred fifty-six".