144423533440 has 64 divisors (see below), whose sum is σ = 345487206960. Its totient is φ = 57731817472.

The previous prime is 144423533411. The next prime is 144423533467. The reversal of 144423533440 is 44335324441.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×144423533440² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144423533440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921267 + ... + 1066573.

Almost surely, 2^144423533440 is an apocalyptic number.

144423533440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144423533440 is an abundant number, since it is smaller than the sum of its proper divisors (201063673520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144423533440 is a wasteful number, since it uses less digits than its factorization.

144423533440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146879 (or 146867 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 144423533440 its reverse (44335324441), we get a palindrome (188758857881).

The spelling of 144423533440 in words is "one hundred forty-four billion, four hundred twenty-three million, five hundred thirty-three thousand, four hundred forty".