163506211633555 has 16 divisors (see below), whose sum is σ = 227395359120384. Its totient is φ = 110539410680160.

The previous prime is 163506211633549. The next prime is 163506211633591. The reversal of 163506211633555 is 555336112605361.

It is not a de Polignac number, because 163506211633555 - 2²³ = 163506203244947 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32898631647 + ... + 32898636616.

It is an arithmetic number, because the mean of its divisors is an integer number (14212209945024).

Almost surely, 2^{163506211633555} is an apocalyptic number.

163506211633555 is a deficient number, since it is larger than the sum of its proper divisors (63889147486829).

163506211633555 is an equidigital number, since it uses as much as digits as its factorization.

163506211633555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65797268346.

The product of its (nonzero) digits is 7290000, while the sum is 52.

The spelling of 163506211633555 in words is "one hundred sixty-three trillion, five hundred six billion, two hundred eleven million, six hundred thirty-three thousand, five hundred fifty-five".