12191935480 has 64 divisors (see below), whose sum is σ = 28280508480. Its totient is φ = 4727424000.

The previous prime is 12191935477. The next prime is 12191935499. The reversal of 12191935480 is 8453919121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233805 + ... + 281155.

It is an arithmetic number, because the mean of its divisors is an integer number (441882945).

Almost surely, 2^12191935480 is an apocalyptic number.

12191935480 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 12191935480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14140254240).

12191935480 is an abundant number, since it is smaller than the sum of its proper divisors (16088573000).

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

12191935480 is a wasteful number, since it uses less digits than its factorization.

12191935480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47560 (or 47556 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 12191935480 in words is "twelve billion, one hundred ninety-one million, nine hundred thirty-five thousand, four hundred eighty".