13663600605 has 48 divisors (see below), whose sum is σ = 24173628336. Its totient is φ = 7136962560.

The previous prime is 13663600583. The next prime is 13663600619. The reversal of 13663600605 is 50600636631.

It is a happy number.

13663600605 is a `hidden beast` number, since 13 + 6 + 6 + 36 + 0 + 0 + 605 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1073414169 + 12590186436 = 32763^2 + 112206^2 .

It is not a de Polignac number, because 13663600605 - 2⁶ = 13663600541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13663600605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1409475 + ... + 1419135.

It is an arithmetic number, because the mean of its divisors is an integer number (503617257).

Almost surely, 2^13663600605 is an apocalyptic number.

13663600605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13663600605 is a deficient number, since it is larger than the sum of its proper divisors (10510027731).

13663600605 is a wasteful number, since it uses less digits than its factorization.

13663600605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10318 (or 10315 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 13663600605 in words is "thirteen billion, six hundred sixty-three million, six hundred thousand, six hundred five".