778996755 has 12 divisors (see below), whose sum is σ = 1350261120. Its totient is φ = 415464912.

The previous prime is 778996721. The next prime is 778996781. The reversal of 778996755 is 557699877.

778996755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 778996755 - 2¹² = 778992659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 778996692 and 778996701.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8655475 + ... + 8655564.

It is an arithmetic number, because the mean of its divisors is an integer number (112521760).

Almost surely, 2^778996755 is an apocalyptic number.

778996755 is a deficient number, since it is larger than the sum of its proper divisors (571264365).

778996755 is a wasteful number, since it uses less digits than its factorization.

778996755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17311050 (or 17311047 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 63.

The square root of 778996755 is about 27910.5133417499. The cubic root of 778996755 is about 920.1215793168.

The spelling of 778996755 in words is "seven hundred seventy-eight million, nine hundred ninety-six thousand, seven hundred fifty-five".