144644213457 has 8 divisors (see below), whose sum is σ = 214287723680. Its totient is φ = 96429475620.

The previous prime is 144644213449. The next prime is 144644213503. The reversal of 144644213457 is 754312446441.

144644213457 is a `hidden beast` number, since 1 + 4 + 464 + 4 + 2 + 134 + 57 = 666.

It is not a de Polignac number, because 144644213457 - 2³ = 144644213449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144644213447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2678596519 + ... + 2678596572.

It is an arithmetic number, because the mean of its divisors is an integer number (26785965460).

Almost surely, 2^144644213457 is an apocalyptic number.

It is an amenable number.

144644213457 is a deficient number, since it is larger than the sum of its proper divisors (69643510223).

144644213457 is an equidigital number, since it uses as much as digits as its factorization.

144644213457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357193100 (or 5357193094 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 45.

Adding to 144644213457 its reverse (754312446441), we get a palindrome (898956659898).

The spelling of 144644213457 in words is "one hundred forty-four billion, six hundred forty-four million, two hundred thirteen thousand, four hundred fifty-seven".