6842399278994 has 4 divisors (see below), whose sum is σ = 10263598918494. Its totient is φ = 3421199639496.

The previous prime is 6842399278993. The next prime is 6842399279039. The reversal of 6842399278994 is 4998729932486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5728540672969 + 1113858606025 = 2393437^2 + 1055395^2 .

It is a super-2 number, since 2×6842399278994² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6842399278993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710599819747 + ... + 1710599819750.

Almost surely, 2^{6842399278994} is an apocalyptic number.

6842399278994 is a deficient number, since it is larger than the sum of its proper divisors (3421199639500).

6842399278994 is a wasteful number, since it uses less digits than its factorization.

6842399278994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421199639499.

The product of its digits is 3386105856, while the sum is 80.

The spelling of 6842399278994 in words is "six trillion, eight hundred forty-two billion, three hundred ninety-nine million, two hundred seventy-eight thousand, nine hundred ninety-four".