144505545257 has 2 divisors, whose sum is σ = 144505545258. Its totient is φ = 144505545256.

The previous prime is 144505545227. The next prime is 144505545263. The reversal of 144505545257 is 752545505441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110420631616 + 34084913641 = 332296^2 + 184621^2 .

It is a cyclic number.

It is not a de Polignac number, because 144505545257 - 2²⁰ = 144504496681 is a prime.

It is a super-2 number, since 2×144505545257² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144505545227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72252772628 + 72252772629.

It is an arithmetic number, because the mean of its divisors is an integer number (72252772629).

Almost surely, 2^144505545257 is an apocalyptic number.

It is an amenable number.

144505545257 is a deficient number, since it is larger than the sum of its proper divisors (1).

144505545257 is an equidigital number, since it uses as much as digits as its factorization.

144505545257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800000, while the sum is 47.

The spelling of 144505545257 in words is "one hundred forty-four billion, five hundred five million, five hundred forty-five thousand, two hundred fifty-seven".