145221116497 has 2 divisors, whose sum is σ = 145221116498. Its totient is φ = 145221116496.

The previous prime is 145221116477. The next prime is 145221116539. The reversal of 145221116497 is 794611122541.

145221116497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109518636096 + 35702480401 = 330936^2 + 188951^2 .

It is an emirp because it is prime and its reverse (794611122541) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145221116497 is a prime.

It is not a weakly prime, because it can be changed into another prime (145221116437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72610558248 + 72610558249.

It is an arithmetic number, because the mean of its divisors is an integer number (72610558249).

Almost surely, 2^145221116497 is an apocalyptic number.

It is an amenable number.

145221116497 is a deficient number, since it is larger than the sum of its proper divisors (1).

145221116497 is an equidigital number, since it uses as much as digits as its factorization.

145221116497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The spelling of 145221116497 in words is "one hundred forty-five billion, two hundred twenty-one million, one hundred sixteen thousand, four hundred ninety-seven".