7842830638139 has 32 divisors (see below), whose sum is σ = 9130488998400. Its totient is φ = 6598466334720.

The previous prime is 7842830638129. The next prime is 7842830638151. The reversal of 7842830638139 is 9318360382487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7842830638139 is a prime.

It is a super-2 number, since 2×7842830638139² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7842830638129) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 34173179 + ... + 34401915.

It is an arithmetic number, because the mean of its divisors is an integer number (285327781200).

Almost surely, 2^{7842830638139} is an apocalyptic number.

7842830638139 is a deficient number, since it is larger than the sum of its proper divisors (1287658360261).

7842830638139 is a wasteful number, since it uses less digits than its factorization.

7842830638139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229283.

The product of its (nonzero) digits is 41803776, while the sum is 62.

The spelling of 7842830638139 in words is "seven trillion, eight hundred forty-two billion, eight hundred thirty million, six hundred thirty-eight thousand, one hundred thirty-nine".