11999449764 has 27 divisors (see below), whose sum is σ = 30333603937. Its totient is φ = 3999597504.

The previous prime is 11999449747. The next prime is 11999449769. The reversal of 11999449764 is 46794499911.

The square root of 11999449764 is 109542.

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

11999449764 is a `hidden beast` number, since 119 + 9 + 9 + 449 + 76 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3646952100 + 8352497664 = 60390^2 + 91392^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11999449769) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 648124 + ... + 666380.

Almost surely, 2^11999449764 is an apocalyptic number.

11999449764 is the 109542-nd square number.

It is an amenable number.

11999449764 is an abundant number, since it is smaller than the sum of its proper divisors (18334154173).

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

11999449764 is an frugal number, since it uses more digits than its factorization.

11999449764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36524 (or 18262 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 11999449764 in words is "eleven billion, nine hundred ninety-nine million, four hundred forty-nine thousand, seven hundred sixty-four".