978797797879 has 24 divisors (see below), whose sum is σ = 1093715466480. Its totient is φ = 875061264000.

The previous prime is 978797797877. The next prime is 978797797883.

978797797879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 978797797879 - 2¹ = 978797797877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978797797877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54101067 + ... + 54119155.

It is an arithmetic number, because the mean of its divisors is an integer number (45571477770).

Almost surely, 2^978797797879 is an apocalyptic number.

978797797879 is a deficient number, since it is larger than the sum of its proper divisors (114917668601).

978797797879 is a wasteful number, since it uses less digits than its factorization.

978797797879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25503 (or 25492 counting only the distinct ones).

The product of its digits is 49401285696, while the sum is 94.

The spelling of 978797797879 in words is "nine hundred seventy-eight billion, seven hundred ninety-seven million, seven hundred ninety-seven thousand, eight hundred seventy-nine".