778972822347 has 4 divisors (see below), whose sum is σ = 1038630429800. Its totient is φ = 519315214896.

The previous prime is 778972822283. The next prime is 778972822349. The reversal of 778972822347 is 743228279877.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 778972822347 - 2⁶ = 778972822283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (778972822349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129828803722 + ... + 129828803727.

It is an arithmetic number, because the mean of its divisors is an integer number (259657607450).

Almost surely, 2^778972822347 is an apocalyptic number.

778972822347 is a deficient number, since it is larger than the sum of its proper divisors (259657607453).

778972822347 is a wasteful number, since it uses less digits than its factorization.

778972822347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259657607452.

The product of its digits is 132765696, while the sum is 66.

The spelling of 778972822347 in words is "seven hundred seventy-eight billion, nine hundred seventy-two million, eight hundred twenty-two thousand, three hundred forty-seven".