11878344101640 has 128 divisors (see below), whose sum is σ = 35978123808000. Its totient is φ = 3137087536128.

The previous prime is 11878344101633. The next prime is 11878344101641. The reversal of 11878344101640 is 4610144387811.

It is a self number, because there is not a number n which added to its sum of digits gives 11878344101640.

It is not an unprimeable number, because it can be changed into a prime (11878344101641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29056981 + ... + 29462939.

It is an arithmetic number, because the mean of its divisors is an integer number (281079092250).

Almost surely, 2^{11878344101640} is an apocalyptic number.

11878344101640 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 11878344101640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17989061904000).

11878344101640 is an abundant number, since it is smaller than the sum of its proper divisors (24099779706360).

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

11878344101640 is a wasteful number, since it uses less digits than its factorization.

11878344101640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408319 (or 408315 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 11878344101640 in words is "eleven trillion, eight hundred seventy-eight billion, three hundred forty-four million, one hundred one thousand, six hundred forty".