145534446217 has 2 divisors, whose sum is σ = 145534446218. Its totient is φ = 145534446216.

The previous prime is 145534446203. The next prime is 145534446251. The reversal of 145534446217 is 712644435541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139650942601 + 5883503616 = 373699^2 + 76704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145534446217 is a prime.

It is a super-2 number, since 2×145534446217² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145534446287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72767223108 + 72767223109.

It is an arithmetic number, because the mean of its divisors is an integer number (72767223109).

Almost surely, 2^145534446217 is an apocalyptic number.

It is an amenable number.

145534446217 is a deficient number, since it is larger than the sum of its proper divisors (1).

145534446217 is an equidigital number, since it uses as much as digits as its factorization.

145534446217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 46.

The spelling of 145534446217 in words is "one hundred forty-five billion, five hundred thirty-four million, four hundred forty-six thousand, two hundred seventeen".