778200043155 has 32 divisors (see below), whose sum is σ = 1300058173440. Its totient is φ = 396749612160.

The previous prime is 778200043123. The next prime is 778200043157. The reversal of 778200043155 is 551340002877.

It is not a de Polignac number, because 778200043155 - 2⁵ = 778200043123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (778200043157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136515 + ... + 1255004.

It is an arithmetic number, because the mean of its divisors is an integer number (40626817920).

Almost surely, 2^778200043155 is an apocalyptic number.

778200043155 is a deficient number, since it is larger than the sum of its proper divisors (521858130285).

778200043155 is a wasteful number, since it uses less digits than its factorization.

778200043155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393171.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 778200043155 in words is "seven hundred seventy-eight billion, two hundred million, forty-three thousand, one hundred fifty-five".