11985739776 has 252 divisors, whose sum is σ = 36114423072. Its totient is φ = 3977330688.

The previous prime is 11985739769. The next prime is 11985739793. The reversal of 11985739776 is 67793758911.

11985739776 is a `hidden beast` number, since 1 + 198 + 57 + 397 + 7 + 6 = 666.

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 17 ways as a sum of consecutive naturals, for example, 53747601 + ... + 53747823.

Almost surely, 2^11985739776 is an apocalyptic number.

11985739776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11985739776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18057211536).

11985739776 is an abundant number, since it is smaller than the sum of its proper divisors (24128683296).

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

11985739776 is an frugal number, since it uses more digits than its factorization.

11985739776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 228 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 63.

The spelling of 11985739776 in words is "eleven billion, nine hundred eighty-five million, seven hundred thirty-nine thousand, seven hundred seventy-six".