12240178649 has 2 divisors, whose sum is σ = 12240178650. Its totient is φ = 12240178648.

The previous prime is 12240178607. The next prime is 12240178729. The reversal of 12240178649 is 94687104221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10522656400 + 1717522249 = 102580^2 + 41443^2 .

It is a cyclic number.

It is not a de Polignac number, because 12240178649 - 2²⁴ = 12223401433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12240178549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6120089324 + 6120089325.

It is an arithmetic number, because the mean of its divisors is an integer number (6120089325).

Almost surely, 2^12240178649 is an apocalyptic number.

It is an amenable number.

12240178649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12240178649 is an equidigital number, since it uses as much as digits as its factorization.

12240178649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 12240178649 in words is "twelve billion, two hundred forty million, one hundred seventy-eight thousand, six hundred forty-nine".