12065491878 has 16 divisors (see below), whose sum is σ = 26324709696. Its totient is φ = 3656209640.

The previous prime is 12065491877. The next prime is 12065491883. The reversal of 12065491878 is 87819456021.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12065491878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12065491873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91405176 + ... + 91405307.

It is an arithmetic number, because the mean of its divisors is an integer number (1645294356).

Almost surely, 2^12065491878 is an apocalyptic number.

12065491878 is an abundant number, since it is smaller than the sum of its proper divisors (14259217818).

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

12065491878 is a wasteful number, since it uses less digits than its factorization.

12065491878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182810499.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 12065491878 in words is "twelve billion, sixty-five million, four hundred ninety-one thousand, eight hundred seventy-eight".