11209438512 has 240 divisors, whose sum is σ = 35109940320. Its totient is φ = 3317760000.

The previous prime is 11209438453. The next prime is 11209438547. The reversal of 11209438512 is 21583490211.

11209438512 is a `hidden beast` number, since 1 + 1 + 20 + 94 + 38 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18651012 + ... + 18651612.

It is an arithmetic number, because the mean of its divisors is an integer number (146291418).

Almost surely, 2^11209438512 is an apocalyptic number.

11209438512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11209438512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17554970160).

11209438512 is an abundant number, since it is smaller than the sum of its proper divisors (23900501808).

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

11209438512 is a wasteful number, since it uses less digits than its factorization.

11209438512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 11209438512 in words is "eleven billion, two hundred nine million, four hundred thirty-eight thousand, five hundred twelve".