163601911475 has 12 divisors (see below), whose sum is σ = 205645363896. Its totient is φ = 129088630080.

The previous prime is 163601911453. The next prime is 163601911477. The reversal of 163601911475 is 574119106361.

It is not a de Polignac number, because 163601911475 - 2⁶ = 163601911411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163601911477) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44820617 + ... + 44824266.

It is an arithmetic number, because the mean of its divisors is an integer number (17137113658).

Almost surely, 2^163601911475 is an apocalyptic number.

163601911475 is a deficient number, since it is larger than the sum of its proper divisors (42043452421).

163601911475 is an equidigital number, since it uses as much as digits as its factorization.

163601911475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89644966 (or 89644961 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 163601911475 in words is "one hundred sixty-three billion, six hundred one million, nine hundred eleven thousand, four hundred seventy-five".