778764996 has 48 divisors (see below), whose sum is σ = 2061991680. Its totient is φ = 254063520.

The previous prime is 778764967. The next prime is 778765003. The reversal of 778764996 is 699467877.

778764996 is a `hidden beast` number, since 7 + 78 + 76 + 499 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71635 + ... + 81786.

It is an arithmetic number, because the mean of its divisors is an integer number (42958160).

Almost surely, 2^778764996 is an apocalyptic number.

It is an amenable number.

778764996 is an abundant number, since it is smaller than the sum of its proper divisors (1283226684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778764996 is a wasteful number, since it uses less digits than its factorization.

778764996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153481 (or 153473 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 778764996 is about 27906.3612103047. The cubic root of 778764996 is about 920.0303219370.

The spelling of 778764996 in words is "seven hundred seventy-eight million, seven hundred sixty-four thousand, nine hundred ninety-six".