7978842958427 has 32 divisors (see below), whose sum is σ = 9119666257920. Its totient is φ = 6914457396000.

The previous prime is 7978842958423. The next prime is 7978842958483. The reversal of 7978842958427 is 7248592488797.

It is a happy number.

It is not a de Polignac number, because 7978842958427 - 2² = 7978842958423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7978842958423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27042224 + ... + 27335682.

It is an arithmetic number, because the mean of its divisors is an integer number (284989570560).

Almost surely, 2^{7978842958427} is an apocalyptic number.

7978842958427 is a deficient number, since it is larger than the sum of its proper divisors (1140823299493).

7978842958427 is a wasteful number, since it uses less digits than its factorization.

7978842958427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294695.

The product of its digits is 4551966720, while the sum is 80.

The spelling of 7978842958427 in words is "seven trillion, nine hundred seventy-eight billion, eight hundred forty-two million, nine hundred fifty-eight thousand, four hundred twenty-seven".