11566959420 has 24 divisors (see below), whose sum is σ = 32387486544. Its totient is φ = 3084522496.

The previous prime is 11566959389. The next prime is 11566959421. The reversal of 11566959420 is 2495966511.

It is a self number, because there is not a number n which added to its sum of digits gives 11566959420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11566959421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96391269 + ... + 96391388.

It is an arithmetic number, because the mean of its divisors is an integer number (1349478606).

Almost surely, 2^11566959420 is an apocalyptic number.

11566959420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11566959420 is an abundant number, since it is smaller than the sum of its proper divisors (20820527124).

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

11566959420 is a wasteful number, since it uses less digits than its factorization.

11566959420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192782669 (or 192782667 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The spelling of 11566959420 in words is "eleven billion, five hundred sixty-six million, nine hundred fifty-nine thousand, four hundred twenty".