145011506609 has 2 divisors, whose sum is σ = 145011506610. Its totient is φ = 145011506608.

The previous prime is 145011506603. The next prime is 145011506641. The reversal of 145011506609 is 906605110541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142460953600 + 2550553009 = 377440^2 + 50503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145011506609 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 (145011506603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72505753304 + 72505753305.

It is an arithmetic number, because the mean of its divisors is an integer number (72505753305).

Almost surely, 2^145011506609 is an apocalyptic number.

It is an amenable number.

145011506609 is a deficient number, since it is larger than the sum of its proper divisors (1).

145011506609 is an equidigital number, since it uses as much as digits as its factorization.

145011506609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 145011506609 in words is "one hundred forty-five billion, eleven million, five hundred six thousand, six hundred nine".