11809409514 has 64 divisors (see below), whose sum is σ = 27910594560. Its totient is φ = 3259776960.

The previous prime is 11809409503. The next prime is 11809409519. The reversal of 11809409514 is 41590490811.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (11809409519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 798612 + ... + 813264.

It is an arithmetic number, because the mean of its divisors is an integer number (436103040).

Almost surely, 2^11809409514 is an apocalyptic number.

11809409514 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11809409514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13955297280).

11809409514 is an abundant number, since it is smaller than the sum of its proper divisors (16101185046).

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

11809409514 is a wasteful number, since it uses less digits than its factorization.

11809409514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15315.

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 11809409514 in words is "eleven billion, eight hundred nine million, four hundred nine thousand, five hundred fourteen".