11889516780 has 144 divisors (see below), whose sum is σ = 38254114080. Its totient is φ = 2978740224.

The previous prime is 11889516731. The next prime is 11889516781. The reversal of 11889516780 is 8761598811.

It is a happy number.

11889516780 is a `hidden beast` number, since 118 + 8 + 9 + 516 + 7 + 8 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (11889516781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1891002 + ... + 1897278.

It is an arithmetic number, because the mean of its divisors is an integer number (265653570).

Almost surely, 2^11889516780 is an apocalyptic number.

11889516780 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 11889516780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19127057040).

11889516780 is an abundant number, since it is smaller than the sum of its proper divisors (26364597300).

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

11889516780 is a wasteful number, since it uses less digits than its factorization.

11889516780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6928 (or 6923 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 54.

The spelling of 11889516780 in words is "eleven billion, eight hundred eighty-nine million, five hundred sixteen thousand, seven hundred eighty".