11409821446 has 4 divisors (see below), whose sum is σ = 17114732172. Its totient is φ = 5704910722.

The previous prime is 11409821333. The next prime is 11409821447. The reversal of 11409821446 is 64412890411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 11409821399 and 11409821408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11409821447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2852455360 + ... + 2852455363.

It is an arithmetic number, because the mean of its divisors is an integer number (4278683043).

Almost surely, 2^11409821446 is an apocalyptic number.

11409821446 is a deficient number, since it is larger than the sum of its proper divisors (5704910726).

11409821446 is an equidigital number, since it uses as much as digits as its factorization.

11409821446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5704910725.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 11409821446 in words is "eleven billion, four hundred nine million, eight hundred twenty-one thousand, four hundred forty-six".