12165615048378 has 64 divisors (see below), whose sum is σ = 27952499796480. Its totient is φ = 3490979659200.

The previous prime is 12165615048337. The next prime is 12165615048403. The reversal of 12165615048378 is 87384051656121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 703108 + ... + 4982528.

It is an arithmetic number, because the mean of its divisors is an integer number (436757809320).

Almost surely, 2^{12165615048378} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12165615048378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13976249898240).

12165615048378 is an abundant number, since it is smaller than the sum of its proper divisors (15786884748102).

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

12165615048378 is a wasteful number, since it uses less digits than its factorization.

12165615048378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281723.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 12165615048378 in words is "twelve trillion, one hundred sixty-five billion, six hundred fifteen million, forty-eight thousand, three hundred seventy-eight".