145218584449 has 2 divisors, whose sum is σ = 145218584450. Its totient is φ = 145218584448.

The previous prime is 145218584447. The next prime is 145218584471. The reversal of 145218584449 is 944485812541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142804631025 + 2413953424 = 377895^2 + 49132^2 .

It is a cyclic number.

It is not a de Polignac number, because 145218584449 - 2¹ = 145218584447 is a prime.

Together with 145218584447, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 145218584449.

It is not a weakly prime, because it can be changed into another prime (145218584447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72609292224 + 72609292225.

It is an arithmetic number, because the mean of its divisors is an integer number (72609292225).

Almost surely, 2^145218584449 is an apocalyptic number.

It is an amenable number.

145218584449 is a deficient number, since it is larger than the sum of its proper divisors (1).

145218584449 is an equidigital number, since it uses as much as digits as its factorization.

145218584449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7372800, while the sum is 55.

The spelling of 145218584449 in words is "one hundred forty-five billion, two hundred eighteen million, five hundred eighty-four thousand, four hundred forty-nine".