11780497444 has 9 divisors (see below), whose sum is σ = 20616250417. Its totient is φ = 5890140184.

The previous prime is 11780497433. The next prime is 11780497447. The reversal of 11780497444 is 44479408711.

The square root of 11780497444 is 108538.

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., 10621775844 + 1158721600 = 103062^2 + 34040^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11780497447) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 189942 + ... + 244210.

Almost surely, 2^11780497444 is an apocalyptic number.

11780497444 is the 108538-th square number.

It is an amenable number.

11780497444 is a deficient number, since it is larger than the sum of its proper divisors (8835752973).

11780497444 is an frugal number, since it uses more digits than its factorization.

11780497444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108542 (or 54271 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

Multiplying 11780497444 by its sum of digits (49), we get a square (577244374756 = 759766²).

The spelling of 11780497444 in words is "eleven billion, seven hundred eighty million, four hundred ninety-seven thousand, four hundred forty-four".