11817771392 has 256 divisors, whose sum is σ = 29898240000. Its totient is φ = 4633251840.

The previous prime is 11817771359. The next prime is 11817771401. The reversal of 11817771392 is 29317771811.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25859228 + ... + 25859684.

It is an arithmetic number, because the mean of its divisors is an integer number (116790000).

Almost surely, 2^11817771392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11817771392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14949120000).

11817771392 is an abundant number, since it is smaller than the sum of its proper divisors (18080468608).

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

11817771392 is an equidigital number, since it uses as much as digits as its factorization.

11817771392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 516 counting only the distinct ones).

The product of its digits is 148176, while the sum is 47.

The spelling of 11817771392 in words is "eleven billion, eight hundred seventeen million, seven hundred seventy-one thousand, three hundred ninety-two".