4278638927069 has 6 divisors (see below), whose sum is σ = 4633082388666. Its totient is φ = 3949512855600.

The previous prime is 4278638927047. The next prime is 4278638927089. The reversal of 4278638927069 is 9607298368724.

It can be written as a sum of positive squares in 3 ways, for example, as 32422323844 + 4246216603225 = 180062^2 + 2060635^2 .

It is not a de Polignac number, because 4278638927069 - 2¹² = 4278638922973 is a prime.

It is a super-2 number, since 2×4278638927069² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4278638926993 and 4278638927011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278638927089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12658694882 + ... + 12658695219.

It is an arithmetic number, because the mean of its divisors is an integer number (772180398111).

Almost surely, 2^{4278638927069} is an apocalyptic number.

It is an amenable number.

4278638927069 is a deficient number, since it is larger than the sum of its proper divisors (354443461597).

4278638927069 is a wasteful number, since it uses less digits than its factorization.

4278638927069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25317390127 (or 25317390114 counting only the distinct ones).

The product of its (nonzero) digits is 438939648, while the sum is 71.

The spelling of 4278638927069 in words is "four trillion, two hundred seventy-eight billion, six hundred thirty-eight million, nine hundred twenty-seven thousand, sixty-nine".