165213014520555 has 24 divisors (see below), whose sum is σ = 293028974594928. Its totient is φ = 86064454074816.

The previous prime is 165213014520493. The next prime is 165213014520557. The reversal of 165213014520555 is 555025410312561.

165213014520555 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 1 + 30 + 1 + 45 + 20 + 555 = 666.

165213014520555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165213014520555 - 2⁷ = 165213014520427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 165213014520555.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42690699492 + ... + 42690703361.

It is an arithmetic number, because the mean of its divisors is an integer number (12209540608122).

Almost surely, 2^{165213014520555} is an apocalyptic number.

165213014520555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165213014520555 is a deficient number, since it is larger than the sum of its proper divisors (127815960074373).

165213014520555 is a wasteful number, since it uses less digits than its factorization.

165213014520555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85381402907 (or 85381402904 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The spelling of 165213014520555 in words is "one hundred sixty-five trillion, two hundred thirteen billion, fourteen million, five hundred twenty thousand, five hundred fifty-five".