778874085 has 24 divisors (see below), whose sum is σ = 1472781024. Its totient is φ = 377635680.

The previous prime is 778874059. The next prime is 778874111. The reversal of 778874085 is 580478877.

It is an interprime number because it is at equal distance from previous prime (778874059) and next prime (778874111).

It is not a de Polignac number, because 778874085 - 2⁵ = 778874053 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 786247 + ... + 787236.

It is an arithmetic number, because the mean of its divisors is an integer number (61365876).

Almost surely, 2^778874085 is an apocalyptic number.

It is an amenable number.

778874085 is a deficient number, since it is larger than the sum of its proper divisors (693906939).

778874085 is a wasteful number, since it uses less digits than its factorization.

778874085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573505 (or 1573502 counting only the distinct ones).

The product of its (nonzero) digits is 3512320, while the sum is 54.

The square root of 778874085 is about 27908.3156962222. The cubic root of 778874085 is about 920.0732790560.

The spelling of 778874085 in words is "seven hundred seventy-eight million, eight hundred seventy-four thousand, eighty-five".