778253055078 has 8 divisors (see below), whose sum is σ = 1556506110168. Its totient is φ = 259417685024.

The previous prime is 778253055077. The next prime is 778253055079. The reversal of 778253055078 is 870550352877.

It is an interprime number because it is at equal distance from previous prime (778253055077) and next prime (778253055079).

It is a sphenic number, since it is the product of 3 distinct primes.

778253055078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778253055077) 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 3 ways as a sum of consecutive naturals, for example, 64854421251 + ... + 64854421262.

It is an arithmetic number, because the mean of its divisors is an integer number (194563263771).

Almost surely, 2^778253055078 is an apocalyptic number.

778253055078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

778253055078 is a wasteful number, since it uses less digits than its factorization.

778253055078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129708842518.

The product of its (nonzero) digits is 16464000, while the sum is 57.

The spelling of 778253055078 in words is "seven hundred seventy-eight billion, two hundred fifty-three million, fifty-five thousand, seventy-eight".