13968866644 has 12 divisors (see below), whose sum is σ = 25508365344. Its totient is φ = 6680762264.

The previous prime is 13968866617. The next prime is 13968866647. The reversal of 13968866644 is 44666886931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13968866647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75917662 + ... + 75917845.

It is an arithmetic number, because the mean of its divisors is an integer number (2125697112).

Almost surely, 2^13968866644 is an apocalyptic number.

It is an amenable number.

13968866644 is a deficient number, since it is larger than the sum of its proper divisors (11539498700).

13968866644 is a wasteful number, since it uses less digits than its factorization.

13968866644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151835534 (or 151835532 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 61.

The spelling of 13968866644 in words is "thirteen billion, nine hundred sixty-eight million, eight hundred sixty-six thousand, six hundred forty-four".