12340564381 has 2 divisors, whose sum is σ = 12340564382. Its totient is φ = 12340564380.

The previous prime is 12340564349. The next prime is 12340564459. The reversal of 12340564381 is 18346504321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8566428025 + 3774136356 = 92555^2 + 61434^2 .

It is a cyclic number.

It is not a de Polignac number, because 12340564381 - 2⁵ = 12340564349 is a prime.

It is a super-2 number, since 2×12340564381² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12340564381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12340564321) 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 as a sum of consecutive naturals, namely, 6170282190 + 6170282191.

It is an arithmetic number, because the mean of its divisors is an integer number (6170282191).

Almost surely, 2^12340564381 is an apocalyptic number.

It is an amenable number.

12340564381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340564381 is an equidigital number, since it uses as much as digits as its factorization.

12340564381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 12340564381 in words is "twelve billion, three hundred forty million, five hundred sixty-four thousand, three hundred eighty-one".