163445511205 has 8 divisors (see below), whose sum is σ = 196137084312. Its totient is φ = 130754761728.

The previous prime is 163445511181. The next prime is 163445511211. The reversal of 163445511205 is 502115544361.

It can be written as a sum of positive squares in 4 ways, for example, as 8448183396 + 154997327809 = 91914^2 + 393697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163445511205 - 2⁹ = 163445510693 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 7 ways as a sum of consecutive naturals, for example, 384669 + ... + 689101.

It is an arithmetic number, because the mean of its divisors is an integer number (24517135539).

Almost surely, 2^163445511205 is an apocalyptic number.

It is an amenable number.

163445511205 is a deficient number, since it is larger than the sum of its proper divisors (32691573107).

163445511205 is a wasteful number, since it uses less digits than its factorization.

163445511205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411815.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 163445511205 in words is "one hundred sixty-three billion, four hundred forty-five million, five hundred eleven thousand, two hundred five".