13440366461 has 2 divisors, whose sum is σ = 13440366462. Its totient is φ = 13440366460.

The previous prime is 13440366403. The next prime is 13440366469. The reversal of 13440366461 is 16466304431.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11068092025 + 2372274436 = 105205^2 + 48706^2 .

It is a cyclic number.

It is not a de Polignac number, because 13440366461 - 2⁶ = 13440366397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13440366469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6720183230 + 6720183231.

It is an arithmetic number, because the mean of its divisors is an integer number (6720183231).

Almost surely, 2^13440366461 is an apocalyptic number.

It is an amenable number.

13440366461 is a deficient number, since it is larger than the sum of its proper divisors (1).

13440366461 is an equidigital number, since it uses as much as digits as its factorization.

13440366461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 13440366461 in words is "thirteen billion, four hundred forty million, three hundred sixty-six thousand, four hundred sixty-one".