5663661523 has 4 divisors (see below), whose sum is σ = 6099327808. Its totient is φ = 5227995240.

The previous prime is 5663661439. The next prime is 5663661599. The reversal of 5663661523 is 3251663665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3251663665 = 5 ⋅650332733.

It is not a de Polignac number, because 5663661523 - 2²⁹ = 5126790611 is a prime.

It is a super-2 number, since 2×5663661523² = 64154123694221359058, which contains 22 as substring.

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 5663661523.

It is not an unprimeable number, because it can be changed into a prime (5663661823) 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 3 ways as a sum of consecutive naturals, for example, 217833123 + ... + 217833148.

It is an arithmetic number, because the mean of its divisors is an integer number (1524831952).

Almost surely, 2^5663661523 is an apocalyptic number.

5663661523 is a deficient number, since it is larger than the sum of its proper divisors (435666285).

5663661523 is a wasteful number, since it uses less digits than its factorization.

5663661523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435666284.

The product of its digits is 583200, while the sum is 43.

The square root of 5663661523 is about 75257.3021241128. The cubic root of 5663661523 is about 1782.5118687144.

The spelling of 5663661523 in words is "five billion, six hundred sixty-three million, six hundred sixty-one thousand, five hundred twenty-three".