12780390167 has 4 divisors (see below), whose sum is σ = 12872335560. Its totient is φ = 12688444776.

The previous prime is 12780390157. The next prime is 12780390179. The reversal of 12780390167 is 76109308721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12780390167 - 2¹⁴ = 12780373783 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 (12780390107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45972488 + ... + 45972765.

It is an arithmetic number, because the mean of its divisors is an integer number (3218083890).

Almost surely, 2^12780390167 is an apocalyptic number.

12780390167 is a deficient number, since it is larger than the sum of its proper divisors (91945393).

12780390167 is an equidigital number, since it uses as much as digits as its factorization.

12780390167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91945392.

The product of its (nonzero) digits is 127008, while the sum is 44.

Adding to 12780390167 its reverse (76109308721), we get a palindrome (88889698888).

The spelling of 12780390167 in words is "twelve billion, seven hundred eighty million, three hundred ninety thousand, one hundred sixty-seven".