163575375661 has 4 divisors (see below), whose sum is σ = 163578474400. Its totient is φ = 163572276924.

The previous prime is 163575375659. The next prime is 163575375671. The reversal of 163575375661 is 166573575361.

It is a happy number.

163575375661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163575375661 - 2¹ = 163575375659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163575375631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1468791 + ... + 1576228.

It is an arithmetic number, because the mean of its divisors is an integer number (40894618600).

Almost surely, 2^163575375661 is an apocalyptic number.

It is an amenable number.

163575375661 is a deficient number, since it is larger than the sum of its proper divisors (3098739).

163575375661 is an equidigital number, since it uses as much as digits as its factorization.

163575375661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3098738.

The product of its digits is 11907000, while the sum is 55.

The spelling of 163575375661 in words is "one hundred sixty-three billion, five hundred seventy-five million, three hundred seventy-five thousand, six hundred sixty-one".