12019517361 has 12 divisors (see below), whose sum is σ = 18382791492. Its totient is φ = 7541657856.

The previous prime is 12019517299. The next prime is 12019517369. The reversal of 12019517361 is 16371591021.

It is a happy number.

12019517361 is a `hidden beast` number, since 1 + 201 + 95 + 1 + 7 + 361 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11176718400 + 842798961 = 105720^2 + 29031^2 .

It is not a de Polignac number, because 12019517361 - 2⁶ = 12019517297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12019517369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39279316 + ... + 39279621.

It is an arithmetic number, because the mean of its divisors is an integer number (1531899291).

Almost surely, 2^12019517361 is an apocalyptic number.

It is an amenable number.

12019517361 is a deficient number, since it is larger than the sum of its proper divisors (6363274131).

12019517361 is a wasteful number, since it uses less digits than its factorization.

12019517361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78558960 (or 78558957 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 12019517361 in words is "twelve billion, nineteen million, five hundred seventeen thousand, three hundred sixty-one".