12783065181 has 4 divisors (see below), whose sum is σ = 17044086912. Its totient is φ = 8522043452.

The previous prime is 12783065173. The next prime is 12783065209. The reversal of 12783065181 is 18156038721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18156038721 = 3 ⋅6052012907.

It is a cyclic number.

It is not a de Polignac number, because 12783065181 - 2³ = 12783065173 is a prime.

It is a super-2 number, since 2×12783065181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12783065111) 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, 2130510861 + ... + 2130510866.

It is an arithmetic number, because the mean of its divisors is an integer number (4261021728).

Almost surely, 2^12783065181 is an apocalyptic number.

It is an amenable number.

12783065181 is a deficient number, since it is larger than the sum of its proper divisors (4261021731).

12783065181 is an equidigital number, since it uses as much as digits as its factorization.

12783065181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261021730.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 12783065181 in words is "twelve billion, seven hundred eighty-three million, sixty-five thousand, one hundred eighty-one".