163243656206545 has 16 divisors (see below), whose sum is σ = 201273908386320. Its totient is φ = 127010301606144.

The previous prime is 163243656206509. The next prime is 163243656206551. The reversal of 163243656206545 is 545602656342361.

It can be written as a sum of positive squares in 8 ways, for example, as 38598734732944 + 124644921473601 = 6212788^2 + 11164449^2 .

It is a cyclic number.

It is not a de Polignac number, because 163243656206545 - 2⁷ = 163243656206417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163243656206545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190650822 + ... + 191505151.

It is an arithmetic number, because the mean of its divisors is an integer number (12579619274145).

Almost surely, 2^{163243656206545} is an apocalyptic number.

It is an amenable number.

163243656206545 is a deficient number, since it is larger than the sum of its proper divisors (38030252179775).

163243656206545 is a wasteful number, since it uses less digits than its factorization.

163243656206545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382158324.

The product of its (nonzero) digits is 93312000, while the sum is 58.

The spelling of 163243656206545 in words is "one hundred sixty-three trillion, two hundred forty-three billion, six hundred fifty-six million, two hundred six thousand, five hundred forty-five".