11566339680 has 384 divisors, whose sum is σ = 44281036800. Its totient is φ = 2478864384.

The previous prime is 11566339663. The next prime is 11566339693. The reversal of 11566339680 is 8693366511.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6574641 + ... + 6576399.

It is an arithmetic number, because the mean of its divisors is an integer number (115315200).

Almost surely, 2^11566339680 is an apocalyptic number.

11566339680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11566339680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22140518400).

11566339680 is an abundant number, since it is smaller than the sum of its proper divisors (32714697120).

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

11566339680 is a wasteful number, since it uses less digits than its factorization.

11566339680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906 (or 1898 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 11566339680 in words is "eleven billion, five hundred sixty-six million, three hundred thirty-nine thousand, six hundred eighty".