144544136260457 has 4 divisors (see below), whose sum is σ = 144544350900180. Its totient is φ = 144543921620736.

The previous prime is 144544136260451. The next prime is 144544136260571. The reversal of 144544136260457 is 754062631445441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75445831633936 + 69098304626521 = 8685956^2 + 8312539^2 .

It is a cyclic number.

It is not a de Polignac number, because 144544136260457 - 2⁴ = 144544136260441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144544136260451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106306532 + ... + 107657637.

It is an arithmetic number, because the mean of its divisors is an integer number (36136087725045).

Almost surely, 2^{144544136260457} is an apocalyptic number.

It is an amenable number.

144544136260457 is a deficient number, since it is larger than the sum of its proper divisors (214639723).

144544136260457 is an equidigital number, since it uses as much as digits as its factorization.

144544136260457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214639722.

The product of its (nonzero) digits is 38707200, while the sum is 56.

The spelling of 144544136260457 in words is "one hundred forty-four trillion, five hundred forty-four billion, one hundred thirty-six million, two hundred sixty thousand, four hundred fifty-seven".