11778784512 has 72 divisors (see below), whose sum is σ = 34198654560. Its totient is φ = 3569326080.

The previous prime is 11778784481. The next prime is 11778784517. The reversal of 11778784512 is 21548787711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11778784517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688687 + ... + 705582.

Almost surely, 2^11778784512 is an apocalyptic number.

11778784512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11778784512 is an abundant number, since it is smaller than the sum of its proper divisors (22419870048).

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

11778784512 is a wasteful number, since it uses less digits than its factorization.

11778784512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394299 (or 1394285 counting only the distinct ones).

The product of its digits is 878080, while the sum is 51.

The spelling of 11778784512 in words is "eleven billion, seven hundred seventy-eight million, seven hundred eighty-four thousand, five hundred twelve".