7838450081668 has 12 divisors (see below), whose sum is σ = 13905195693340. Its totient is φ = 3865537026432.

The previous prime is 7838450081663. The next prime is 7838450081677. The reversal of 7838450081668 is 8661800548387.

It can be written as a sum of positive squares in 2 ways, for example, as 2744184407364 + 5094265674304 = 1656558^2 + 2257048^2 .

It is a super-2 number, since 2×7838450081668² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7838450081663) 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, 13422003273 + ... + 13422003856.

Almost surely, 2^{7838450081668} is an apocalyptic number.

It is an amenable number.

7838450081668 is a deficient number, since it is larger than the sum of its proper divisors (6066745611672).

7838450081668 is a wasteful number, since it uses less digits than its factorization.

7838450081668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26844007206 (or 26844007204 counting only the distinct ones).

The product of its (nonzero) digits is 61931520, while the sum is 64.

The spelling of 7838450081668 in words is "seven trillion, eight hundred thirty-eight billion, four hundred fifty million, eighty-one thousand, six hundred sixty-eight".