8424378372818 has 12 divisors (see below), whose sum is σ = 12701038298442. Its totient is φ = 4190807476800.

The previous prime is 8424378372803. The next prime is 8424378372821. The reversal of 8424378372818 is 8182738734248.

It can be written as a sum of positive squares in 3 ways, for example, as 7913492226649 + 510886146169 = 2813093^2 + 714763^2 .

It is a super-2 number, since 2×8424378372818² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54190583 + ... + 54345818.

Almost surely, 2^{8424378372818} is an apocalyptic number.

8424378372818 is a deficient number, since it is larger than the sum of its proper divisors (4276659925624).

8424378372818 is a wasteful number, since it uses less digits than its factorization.

8424378372818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108536797 (or 108536600 counting only the distinct ones).

The product of its digits is 115605504, while the sum is 65.

The spelling of 8424378372818 in words is "eight trillion, four hundred twenty-four billion, three hundred seventy-eight million, three hundred seventy-two thousand, eight hundred eighteen".