11801780496 has 135 divisors (see below), whose sum is σ = 36348322647. Its totient is φ = 3571951680.

The previous prime is 11801780491. The next prime is 11801780509. The reversal of 11801780496 is 69408710811.

It is a happy number.

The square root of 11801780496 is 108636.

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

11801780496 is a `hidden beast` number, since 1 + 1 + 80 + 1 + 7 + 80 + 496 = 666.

It is not an unprimeable number, because it can be changed into a prime (11801780491) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14339541 + ... + 14340363.

Almost surely, 2^11801780496 is an apocalyptic number.

11801780496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

11801780496 is the 108636-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11801780496

11801780496 is an abundant number, since it is smaller than the sum of its proper divisors (24546542151).

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

11801780496 is an equidigital number, since it uses as much as digits as its factorization.

11801780496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

It can be divided in two parts, 11801 and 780496, that added together give a palindrome (792297).

The spelling of 11801780496 in words is "eleven billion, eight hundred one million, seven hundred eighty thousand, four hundred ninety-six".