778091131636140 has 384 divisors, whose sum is σ = 2575907885150208. Its totient is φ = 171777851781120.

The previous prime is 778091131636099. The next prime is 778091131636151. The reversal of 778091131636140 is 41636131190877.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 2588456289 + ... + 2588756871.

It is an arithmetic number, because the mean of its divisors is an integer number (6708093450912).

Almost surely, 2^{778091131636140} is an apocalyptic number.

778091131636140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778091131636140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287953942575104).

778091131636140 is an abundant number, since it is smaller than the sum of its proper divisors (1797816753514068).

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

778091131636140 is a wasteful number, since it uses less digits than its factorization.

778091131636140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301857 (or 301855 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 57.

It can be divided in two parts, 778091 and 131636140, that added together give a palindrome (132414231).

The spelling of 778091131636140 in words is "seven hundred seventy-eight trillion, ninety-one billion, one hundred thirty-one million, six hundred thirty-six thousand, one hundred forty".