11421621680 has 120 divisors (see below), whose sum is σ = 31175393040. Its totient is φ = 3879912960.

The previous prime is 11421621643. The next prime is 11421621703. The reversal of 11421621680 is 8612612411.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413915 + ... + 440645.

It is an arithmetic number, because the mean of its divisors is an integer number (259794942).

Almost surely, 2^11421621680 is an apocalyptic number.

11421621680 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 11421621680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15587696520).

11421621680 is an abundant number, since it is smaller than the sum of its proper divisors (19753771360).

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

11421621680 is a wasteful number, since it uses less digits than its factorization.

11421621680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26867 (or 26854 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 11421621680 in words is "eleven billion, four hundred twenty-one million, six hundred twenty-one thousand, six hundred eighty".