11840828409 has 6 divisors (see below), whose sum is σ = 17103418826. Its totient is φ = 7893885600.

The previous prime is 11840828387. The next prime is 11840828437. The reversal of 11840828409 is 90482804811.

It can be written as a sum of positive squares in only one way, i.e., 11550875625 + 289952784 = 107475^2 + 17028^2 .

It is not a de Polignac number, because 11840828409 - 2³³ = 3250893817 is a prime.

It is a super-2 number, since 2×11840828409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11840828449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 657823792 + ... + 657823809.

Almost surely, 2^11840828409 is an apocalyptic number.

It is an amenable number.

11840828409 is a deficient number, since it is larger than the sum of its proper divisors (5262590417).

11840828409 is a wasteful number, since it uses less digits than its factorization.

11840828409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315647607 (or 1315647604 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 11840828409 in words is "eleven billion, eight hundred forty million, eight hundred twenty-eight thousand, four hundred nine".