12161780782 has 8 divisors (see below), whose sum is σ = 18250571952. Its totient is φ = 6078256800.

The previous prime is 12161780753. The next prime is 12161780783. The reversal of 12161780782 is 28708716121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161780783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311019 + ... + 1320262.

It is an arithmetic number, because the mean of its divisors is an integer number (2281321494).

Almost surely, 2^12161780782 is an apocalyptic number.

12161780782 is a deficient number, since it is larger than the sum of its proper divisors (6088791170).

12161780782 is a wasteful number, since it uses less digits than its factorization.

12161780782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633594.

The product of its (nonzero) digits is 75264, while the sum is 43.

The spelling of 12161780782 in words is "twelve billion, one hundred sixty-one million, seven hundred eighty thousand, seven hundred eighty-two".