11946778368 has 72 divisors (see below), whose sum is σ = 36338133888. Its totient is φ = 3413363712.

The previous prime is 11946778309. The next prime is 11946778463. The reversal of 11946778368 is 86387764911.

It is a super-2 number, since 2×11946778368² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1105746 + ... + 1116497.

It is an arithmetic number, because the mean of its divisors is an integer number (504696304).

Almost surely, 2^11946778368 is an apocalyptic number.

It is an amenable number.

11946778368 is an abundant number, since it is smaller than the sum of its proper divisors (24391355520).

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

11946778368 is an equidigital number, since it uses as much as digits as its factorization.

11946778368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222269 (or 2222255 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The spelling of 11946778368 in words is "eleven billion, nine hundred forty-six million, seven hundred seventy-eight thousand, three hundred sixty-eight".