144442874581 has 8 divisors (see below), whose sum is σ = 148015303128. Its totient is φ = 140872800000.

The previous prime is 144442874573. The next prime is 144442874593. The reversal of 144442874581 is 185478244441.

It can be written as a sum of positive squares in 4 ways, for example, as 61873956 + 144381000625 = 7866^2 + 379975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144442874581 - 2³ = 144442874573 is a prime.

It is a super-2 number, since 2×144442874581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144442877581) 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, 463930 + ... + 710011.

It is an arithmetic number, because the mean of its divisors is an integer number (18501912891).

Almost surely, 2^144442874581 is an apocalyptic number.

It is an amenable number.

144442874581 is a deficient number, since it is larger than the sum of its proper divisors (3572428547).

144442874581 is a wasteful number, since it uses less digits than its factorization.

144442874581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176983.

The product of its digits is 4587520, while the sum is 52.

The spelling of 144442874581 in words is "one hundred forty-four billion, four hundred forty-two million, eight hundred seventy-four thousand, five hundred eighty-one".