11980834849 has 9 divisors (see below), whose sum is σ = 12527021073. Its totient is φ = 11457520932.

The previous prime is 11980834787. The next prime is 11980834867. The reversal of 11980834849 is 94843808911.

It is a happy number.

The square root of 11980834849 is 109457.

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

It is not a de Polignac number, because 11980834849 - 2²¹ = 11978737697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11980834849.

It is not an unprimeable number, because it can be changed into a prime (11980834049) 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, 2515132 + ... + 2519890.

Almost surely, 2^11980834849 is an apocalyptic number.

11980834849 is the 109457-th square number.

11980834849 is the 54729-th centered octagonal number.

It is an amenable number.

11980834849 is a deficient number, since it is larger than the sum of its proper divisors (546186224).

11980834849 is an frugal number, since it uses more digits than its factorization.

11980834849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9564 (or 4782 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The spelling of 11980834849 in words is "eleven billion, nine hundred eighty million, eight hundred thirty-four thousand, eight hundred forty-nine".