163561607 has 8 divisors (see below), whose sum is σ = 188926992. Its totient is φ = 139945600.

The previous prime is 163561589. The next prime is 163561661. The reversal of 163561607 is 706165361.

It is a happy number.

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 163561607 - 2¹⁰ = 163560583 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 (163561667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437144 + ... + 437517.

It is an arithmetic number, because the mean of its divisors is an integer number (23615874).

Almost surely, 2^163561607 is an apocalyptic number.

163561607 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

163561607 is a deficient number, since it is larger than the sum of its proper divisors (25365385).

163561607 is a wasteful number, since it uses less digits than its factorization.

163561607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874689.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 163561607 is about 12789.1206499900. The cubic root of 163561607 is about 546.8822018839.

The spelling of 163561607 in words is "one hundred sixty-three million, five hundred sixty-one thousand, six hundred seven".