978788128786 has 32 divisors (see below), whose sum is σ = 1632392391168. Its totient is φ = 437103717120.

The previous prime is 978788128757. The next prime is 978788128837. The reversal of 978788128786 is 687821887879.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4946101 + ... + 5140183.

It is an arithmetic number, because the mean of its divisors is an integer number (51012262224).

Almost surely, 2^978788128786 is an apocalyptic number.

978788128786 is a deficient number, since it is larger than the sum of its proper divisors (653604262382).

978788128786 is a wasteful number, since it uses less digits than its factorization.

978788128786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200386.

The product of its digits is 1213857792, while the sum is 79.

The spelling of 978788128786 in words is "nine hundred seventy-eight billion, seven hundred eighty-eight million, one hundred twenty-eight thousand, seven hundred eighty-six".