12540243067 has 32 divisors (see below), whose sum is σ = 14793891840. Its totient is φ = 10506528000.

The previous prime is 12540243059. The next prime is 12540243083. The reversal of 12540243067 is 76034204521.

It is a cyclic number.

It is not a de Polignac number, because 12540243067 - 2³ = 12540243059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12540243047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3280017 + ... + 3283837.

It is an arithmetic number, because the mean of its divisors is an integer number (462309120).

Almost surely, 2^12540243067 is an apocalyptic number.

12540243067 is a deficient number, since it is larger than the sum of its proper divisors (2253648773).

12540243067 is a wasteful number, since it uses less digits than its factorization.

12540243067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4275.

The product of its (nonzero) digits is 40320, while the sum is 34.

Adding to 12540243067 its reverse (76034204521), we get a palindrome (88574447588).

The spelling of 12540243067 in words is "twelve billion, five hundred forty million, two hundred forty-three thousand, sixty-seven".