778000338655 has 8 divisors (see below), whose sum is σ = 982737270000. Its totient is φ = 589642361856.

The previous prime is 778000338641. The next prime is 778000338659. The reversal of 778000338655 is 556833000877.

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

It is a cyclic number.

It is not a de Polignac number, because 778000338655 - 2¹⁷ = 778000207583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778000338659) 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 7 ways as a sum of consecutive naturals, for example, 4094738530 + ... + 4094738719.

It is an arithmetic number, because the mean of its divisors is an integer number (122842158750).

Almost surely, 2^778000338655 is an apocalyptic number.

778000338655 is a deficient number, since it is larger than the sum of its proper divisors (204736931345).

778000338655 is a wasteful number, since it uses less digits than its factorization.

778000338655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189477273.

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 778000338655 in words is "seven hundred seventy-eight billion, three hundred thirty-eight thousand, six hundred fifty-five".