7878187878069 has 32 divisors (see below), whose sum is σ = 11382287266944. Its totient is φ = 4827589079040.

The previous prime is 7878187878053. The next prime is 7878187878091. The reversal of 7878187878069 is 9608787818787.

It is not a de Polignac number, because 7878187878069 - 2⁴ = 7878187878053 is a prime.

It is a super-2 number, since 2×7878187878069² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7878187877982 and 7878187878000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7878187873069) 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, 16859559 + ... + 17320539.

It is an arithmetic number, because the mean of its divisors is an integer number (355696477092).

Almost surely, 2^{7878187878069} is an apocalyptic number.

It is an amenable number.

7878187878069 is a deficient number, since it is larger than the sum of its proper divisors (3504099388875).

7878187878069 is a wasteful number, since it uses less digits than its factorization.

7878187878069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468837.

The product of its (nonzero) digits is 4248502272, while the sum is 84.

The spelling of 7878187878069 in words is "seven trillion, eight hundred seventy-eight billion, one hundred eighty-seven million, eight hundred seventy-eight thousand, sixty-nine".