9778246878 has 16 divisors (see below), whose sum is σ = 19574399376. Its totient is φ = 3256431360.

The previous prime is 9778246873. The next prime is 9778246879. The reversal of 9778246878 is 8786428779.

9778246878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9778246878² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9778246873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738963 + ... + 752078.

It is an arithmetic number, because the mean of its divisors is an integer number (1223399961).

Almost surely, 2^9778246878 is an apocalyptic number.

9778246878 is an abundant number, since it is smaller than the sum of its proper divisors (9796152498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9778246878 is a wasteful number, since it uses less digits than its factorization.

9778246878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492139.

The product of its digits is 75866112, while the sum is 66.

The square root of 9778246878 is about 98885.0184709494. The cubic root of 9778246878 is about 2138.3904161564.

The spelling of 9778246878 in words is "nine billion, seven hundred seventy-eight million, two hundred forty-six thousand, eight hundred seventy-eight".