3688618788658 has 12 divisors (see below), whose sum is σ = 5839461601470. Its totient is φ = 1747240478496.

The previous prime is 3688618788581. The next prime is 3688618788661. The reversal of 3688618788658 is 8568878168863.

It can be written as a sum of positive squares in only one way, i.e., 2833387793289 + 855230995369 = 1683267^2 + 924787^2 .

It is a super-2 number, since 2×3688618788658² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2554444423 + ... + 2554445866.

Almost surely, 2^{3688618788658} is an apocalyptic number.

3688618788658 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3688618788658 is a deficient number, since it is larger than the sum of its proper divisors (2150842812812).

3688618788658 is a wasteful number, since it uses less digits than its factorization.

3688618788658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108890329 (or 5108890310 counting only the distinct ones).

The product of its digits is 5945425920, while the sum is 82.

It can be divided in two parts, 368861 and 8788658, that added together give a palindrome (9157519).

The spelling of 3688618788658 in words is "three trillion, six hundred eighty-eight billion, six hundred eighteen million, seven hundred eighty-eight thousand, six hundred fifty-eight".