11209451540 has 48 divisors (see below), whose sum is σ = 26937926400. Its totient is φ = 3838205952.

The previous prime is 11209451531. The next prime is 11209451597. The reversal of 11209451540 is 4515490211.

It is a junction number, because it is equal to n+sod(n) for n = 11209451497 and 11209451506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55601 + ... + 159719.

It is an arithmetic number, because the mean of its divisors is an integer number (561206800).

Almost surely, 2^11209451540 is an apocalyptic number.

11209451540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11209451540 is an abundant number, since it is smaller than the sum of its proper divisors (15728474860).

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

11209451540 is a wasteful number, since it uses less digits than its factorization.

11209451540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104904 (or 104902 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 11209451540 in words is "eleven billion, two hundred nine million, four hundred fifty-one thousand, five hundred forty".