165163315455 has 24 divisors (see below), whose sum is σ = 287397042192. Its totient is φ = 87744344064.

The previous prime is 165163315453. The next prime is 165163315459. The reversal of 165163315455 is 554513361561.

165163315455 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 633 + 1 + 5 + 4 + 5 + 5 = 666.

It is not a de Polignac number, because 165163315455 - 2¹ = 165163315453 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 165163315455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165163315453) 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, 7129089 + ... + 7152218.

It is an arithmetic number, because the mean of its divisors is an integer number (11974876758).

Almost surely, 2^165163315455 is an apocalyptic number.

165163315455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165163315455 is a deficient number, since it is larger than the sum of its proper divisors (122233726737).

165163315455 is a wasteful number, since it uses less digits than its factorization.

165163315455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14281575 (or 14281572 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The spelling of 165163315455 in words is "one hundred sixty-five billion, one hundred sixty-three million, three hundred fifteen thousand, four hundred fifty-five".