11889968580 has 216 divisors, whose sum is σ = 44163362880. Its totient is φ = 2574633600.

The previous prime is 11889968579. The next prime is 11889968609. The reversal of 11889968580 is 8586998811.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 132105 + ... + 203055.

Almost surely, 2^11889968580 is an apocalyptic number.

11889968580 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 11889968580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22081681440).

11889968580 is an abundant number, since it is smaller than the sum of its proper divisors (32273394300).

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

11889968580 is a wasteful number, since it uses less digits than its factorization.

11889968580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70999 (or 70987 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 63.

The spelling of 11889968580 in words is "eleven billion, eight hundred eighty-nine million, nine hundred sixty-eight thousand, five hundred eighty".