163551623 has 8 divisors (see below), whose sum is σ = 167643120. Its totient is φ = 159508800.

The previous prime is 163551593. The next prime is 163551637. The reversal of 163551623 is 326155361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163551623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163551623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163551683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5318 + ... + 18851.

It is an arithmetic number, because the mean of its divisors is an integer number (20955390).

Almost surely, 2^163551623 is an apocalyptic number.

163551623 is a deficient number, since it is larger than the sum of its proper divisors (4091497).

163551623 is a wasteful number, since it uses less digits than its factorization.

163551623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24337.

The product of its digits is 16200, while the sum is 32.

The square root of 163551623 is about 12788.7303122710. The cubic root of 163551623 is about 546.8710742053.

The spelling of 163551623 in words is "one hundred sixty-three million, five hundred fifty-one thousand, six hundred twenty-three".