778642842141 has 16 divisors (see below), whose sum is σ = 1153688411200. Its totient is φ = 519030671184.

The previous prime is 778642842137. The next prime is 778642842149. The reversal of 778642842141 is 141248246877.

It is a happy number.

778642842141 is a `hidden beast` number, since 7 + 78 + 6 + 428 + 4 + 2 + 141 = 666.

It is not a de Polignac number, because 778642842141 - 2² = 778642842137 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 (778642842149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1571626 + ... + 2006811.

It is an arithmetic number, because the mean of its divisors is an integer number (72105525700).

Almost surely, 2^778642842141 is an apocalyptic number.

It is an amenable number.

778642842141 is a deficient number, since it is larger than the sum of its proper divisors (375045569059).

778642842141 is a wasteful number, since it uses less digits than its factorization.

778642842141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586505 (or 3586499 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The spelling of 778642842141 in words is "seven hundred seventy-eight billion, six hundred forty-two million, eight hundred forty-two thousand, one hundred forty-one".