11781799936 has 69 divisors (see below), whose sum is σ = 24016581841. Its totient is φ = 5779750912.

The previous prime is 11781799879. The next prime is 11781799937. The reversal of 11781799936 is 63999718711.

The square root of 11781799936 is 108544.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8493465600 + 3288334336 = 92160^2 + 57344^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11781799937) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 222298086 + ... + 222298138.

Almost surely, 2^11781799936 is an apocalyptic number.

11781799936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

11781799936 is the 108544-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11781799936

11781799936 is an abundant number, since it is smaller than the sum of its proper divisors (12234781905).

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

11781799936 is an frugal number, since it uses more digits than its factorization.

11781799936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 55 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 61.

The spelling of 11781799936 in words is "eleven billion, seven hundred eighty-one million, seven hundred ninety-nine thousand, nine hundred thirty-six".