778355053 has 6 divisors (see below), whose sum is σ = 905433486. Its totient is φ = 667161432.

The previous prime is 778355027. The next prime is 778355087. The reversal of 778355053 is 350553877.

778355053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 491154244 + 287200809 = 22162^2 + 16947^2 .

It is not a de Polignac number, because 778355053 - 2⁵ = 778355021 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 (778355003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7942350 + ... + 7942447.

It is an arithmetic number, because the mean of its divisors is an integer number (150905581).

Almost surely, 2^778355053 is an apocalyptic number.

It is an amenable number.

778355053 is a deficient number, since it is larger than the sum of its proper divisors (127078433).

778355053 is a wasteful number, since it uses less digits than its factorization.

778355053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15884811 (or 15884804 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 43.

The square root of 778355053 is about 27899.0152693603. The cubic root of 778355053 is about 919.8688585127.

The spelling of 778355053 in words is "seven hundred seventy-eight million, three hundred fifty-five thousand, fifty-three".