13663665440 has 48 divisors (see below), whose sum is σ = 32355469440. Its totient is φ = 5452757760.

The previous prime is 13663665439. The next prime is 13663665479. The reversal of 13663665440 is 4456636631.

It is a junction number, because it is equal to n+sod(n) for n = 13663665391 and 13663665400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30110 + ... + 168029.

It is an arithmetic number, because the mean of its divisors is an integer number (674072280).

Almost surely, 2^13663665440 is an apocalyptic number.

13663665440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13663665440 is an abundant number, since it is smaller than the sum of its proper divisors (18691804000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13663665440 is a wasteful number, since it uses less digits than its factorization.

13663665440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198585 (or 198577 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 13663665440 in words is "thirteen billion, six hundred sixty-three million, six hundred sixty-five thousand, four hundred forty".