5663721747505 has 4 divisors (see below), whose sum is σ = 6796466097012. Its totient is φ = 4530977398000.

The previous prime is 5663721747479. The next prime is 5663721747511. The reversal of 5663721747505 is 5057471273665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 743306071104 + 4920415676401 = 862152^2 + 2218201^2 .

It is not a de Polignac number, because 5663721747505 - 2²⁷ = 5663587529777 is a prime.

It is a super-2 number, since 2×5663721747505² (a number of 26 digits) 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 5663721747505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566372174746 + ... + 566372174755.

It is an arithmetic number, because the mean of its divisors is an integer number (1699116524253).

Almost surely, 2^{5663721747505} is an apocalyptic number.

It is an amenable number.

5663721747505 is a deficient number, since it is larger than the sum of its proper divisors (1132744349507).

5663721747505 is a wasteful number, since it uses less digits than its factorization.

5663721747505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132744349506.

The product of its (nonzero) digits is 37044000, while the sum is 58.

The spelling of 5663721747505 in words is "five trillion, six hundred sixty-three billion, seven hundred twenty-one million, seven hundred forty-seven thousand, five hundred five".