7368684868638 has 128 divisors (see below), whose sum is σ = 17339452416000. Its totient is φ = 2313114783840.

The previous prime is 7368684868613. The next prime is 7368684868669. The reversal of 7368684868638 is 8368684868637.

7368684868638 is a `hidden beast` number, since 73 + 6 + 8 + 6 + 8 + 486 + 8 + 63 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 139990881 + ... + 140043507.

It is an arithmetic number, because the mean of its divisors is an integer number (135464472000).

Almost surely, 2^{7368684868638} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7368684868638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8669726208000).

7368684868638 is an abundant number, since it is smaller than the sum of its proper divisors (9970767547362).

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

7368684868638 is a wasteful number, since it uses less digits than its factorization.

7368684868638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53467 (or 53461 counting only the distinct ones).

The product of its digits is 10701766656, while the sum is 81.

Subtracting 7368684868638 from its reverse (8368684868637), we obtain a palindrome (999999999999).

The spelling of 7368684868638 in words is "seven trillion, three hundred sixty-eight billion, six hundred eighty-four million, eight hundred sixty-eight thousand, six hundred thirty-eight".