13068618638 has 16 divisors (see below), whose sum is σ = 20285210160. Its totient is φ = 6307022400.

The previous prime is 13068618637. The next prime is 13068618659. The reversal of 13068618638 is 83681686031.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13068618631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162098 + ... + 228938.

It is an arithmetic number, because the mean of its divisors is an integer number (1267825635).

Almost surely, 2^13068618638 is an apocalyptic number.

13068618638 is a deficient number, since it is larger than the sum of its proper divisors (7216591522).

13068618638 is a wasteful number, since it uses less digits than its factorization.

13068618638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70243.

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 13068618638 in words is "thirteen billion, sixty-eight million, six hundred eighteen thousand, six hundred thirty-eight".