13663985940 has 144 divisors (see below), whose sum is σ = 46674141696. Its totient is φ = 3205612800.

The previous prime is 13663985939. The next prime is 13663985947. The reversal of 13663985940 is 4958936631.

13663985940 is a `hidden beast` number, since 13 + 6 + 6 + 39 + 8 + 594 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663985947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49927 + ... + 172686.

It is an arithmetic number, because the mean of its divisors is an integer number (324125984).

Almost surely, 2^13663985940 is an apocalyptic number.

13663985940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13663985940 is an abundant number, since it is smaller than the sum of its proper divisors (33010155756).

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

13663985940 is a wasteful number, since it uses less digits than its factorization.

13663985940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222670 (or 222665 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 13663985940 in words is "thirteen billion, six hundred sixty-three million, nine hundred eighty-five thousand, nine hundred forty".