163145565442645 has 16 divisors (see below), whose sum is σ = 197714581143408. Its totient is φ = 129223204070400.

The previous prime is 163145565442571. The next prime is 163145565442663. The reversal of 163145565442645 is 546244565541361.

It can be written as a sum of positive squares in 8 ways, for example, as 5915859520516 + 157229705922129 = 2432254^2 + 12539127^2 .

It is not a de Polignac number, because 163145565442645 - 2²³ = 163145557054037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67367437 + ... + 69747133.

It is an arithmetic number, because the mean of its divisors is an integer number (12357161321463).

Almost surely, 2^{163145565442645} is an apocalyptic number.

It is an amenable number.

163145565442645 is a deficient number, since it is larger than the sum of its proper divisors (34569015700763).

163145565442645 is a wasteful number, since it uses less digits than its factorization.

163145565442645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515560.

The product of its digits is 207360000, while the sum is 61.

The spelling of 163145565442645 in words is "one hundred sixty-three trillion, one hundred forty-five billion, five hundred sixty-five million, four hundred forty-two thousand, six hundred forty-five".