12178137807 has 24 divisors (see below), whose sum is σ = 19830949040. Its totient is φ = 7380687600.

The previous prime is 12178137781. The next prime is 12178137809. The reversal of 12178137807 is 70873187121.

It is a happy number.

It is not a de Polignac number, because 12178137807 - 2¹⁰ = 12178136783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12178137809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1860544 + ... + 1867077.

Almost surely, 2^12178137807 is an apocalyptic number.

12178137807 is a deficient number, since it is larger than the sum of its proper divisors (7652811233).

12178137807 is a wasteful number, since it uses less digits than its factorization.

12178137807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727652 (or 3727635 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 45.

The spelling of 12178137807 in words is "twelve billion, one hundred seventy-eight million, one hundred thirty-seven thousand, eight hundred seven".