144261026440 has 32 divisors (see below), whose sum is σ = 324627085080. Its totient is φ = 57697339392.

The previous prime is 144261026369. The next prime is 144261026467. The reversal of 144261026440 is 44620162441.

It can be written as a sum of positive squares in 4 ways, for example, as 115870798404 + 28390228036 = 340398^2 + 168494^2 .

It is a super-2 number, since 2×144261026440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 144261026396 and 144261026405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115864 + ... + 549496.

Almost surely, 2^144261026440 is an apocalyptic number.

144261026440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144261026440 is an abundant number, since it is smaller than the sum of its proper divisors (180366058640).

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

144261026440 is a wasteful number, since it uses less digits than its factorization.

144261026440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441961 (or 441957 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 144261026440 its reverse (44620162441), we get a palindrome (188881188881).

The spelling of 144261026440 in words is "one hundred forty-four billion, two hundred sixty-one million, twenty-six thousand, four hundred forty".