12735732409 has 2 divisors, whose sum is σ = 12735732410. Its totient is φ = 12735732408.

The previous prime is 12735732367. The next prime is 12735732419. The reversal of 12735732409 is 90423753721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11448358009 + 1287374400 = 106997^2 + 35880^2 .

It is a cyclic number.

It is not a de Polignac number, because 12735732409 - 2¹³ = 12735724217 is a prime.

It is not a weakly prime, because it can be changed into another prime (12735732419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6367866204 + 6367866205.

It is an arithmetic number, because the mean of its divisors is an integer number (6367866205).

Almost surely, 2^12735732409 is an apocalyptic number.

It is an amenable number.

12735732409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12735732409 is an equidigital number, since it uses as much as digits as its factorization.

12735732409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 12735732409 in words is "twelve billion, seven hundred thirty-five million, seven hundred thirty-two thousand, four hundred nine".