1659327563 has 4 divisors (see below), whose sum is σ = 1659746088. Its totient is φ = 1658909040.

The previous prime is 1659327557. The next prime is 1659327599. The reversal of 1659327563 is 3657239561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3657239561 = 29 ⋅126111709.

It is a cyclic number.

It is not a de Polignac number, because 1659327563 - 2⁶ = 1659327499 is a prime.

It is a super-2 number, since 2×1659327563² = 5506735922663037938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1659327463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203258 + ... + 211263.

It is an arithmetic number, because the mean of its divisors is an integer number (414936522).

Almost surely, 2^1659327563 is an apocalyptic number.

1659327563 is a deficient number, since it is larger than the sum of its proper divisors (418525).

1659327563 is an equidigital number, since it uses as much as digits as its factorization.

1659327563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418524.

The product of its digits is 1020600, while the sum is 47.

The square root of 1659327563 is about 40734.8445805308. The cubic root of 1659327563 is about 1183.8882468768. Note that the first 3 decimals are identical.

The spelling of 1659327563 in words is "one billion, six hundred fifty-nine million, three hundred twenty-seven thousand, five hundred sixty-three".