11209666452 has 12 divisors (see below), whose sum is σ = 26155888416. Its totient is φ = 3736555480.

The previous prime is 11209666451. The next prime is 11209666511. The reversal of 11209666452 is 25466690211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11209666451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467069424 + ... + 467069447.

It is an arithmetic number, because the mean of its divisors is an integer number (2179657368).

Almost surely, 2^11209666452 is an apocalyptic number.

11209666452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11209666452 is an abundant number, since it is smaller than the sum of its proper divisors (14946221964).

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

11209666452 is a wasteful number, since it uses less digits than its factorization.

11209666452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934138878 (or 934138876 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 11209666452 in words is "eleven billion, two hundred nine million, six hundred sixty-six thousand, four hundred fifty-two".