11215844409 has 24 divisors (see below), whose sum is σ = 18785771200. Its totient is φ = 5826411360.

The previous prime is 11215844399. The next prime is 11215844411. The reversal of 11215844409 is 90444851211.

It is not a de Polignac number, because 11215844409 - 2⁵ = 11215844377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11215844429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2204434 + ... + 2209515.

Almost surely, 2^11215844409 is an apocalyptic number.

It is an amenable number.

11215844409 is a deficient number, since it is larger than the sum of its proper divisors (7569926791).

11215844409 is a wasteful number, since it uses less digits than its factorization.

11215844409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413981 (or 4413970 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 11215844409 in words is "eleven billion, two hundred fifteen million, eight hundred forty-four thousand, four hundred nine".