144646344977 has 8 divisors (see below), whose sum is σ = 147059475240. Its totient is φ = 142234565760.

The previous prime is 144646344949. The next prime is 144646344989. The reversal of 144646344977 is 779443646441.

It is a Cunningham number, because it is equal to 380324²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 4703765056 + 139942579921 = 68584^2 + 374089^2 .

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 144646344977 - 2²² = 144642150673 is a prime.

It is a super-4 number, since 4×144646344977⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144646344917) 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, 120698 + ... + 551235.

It is an arithmetic number, because the mean of its divisors is an integer number (18382434405).

Almost surely, 2^144646344977 is an apocalyptic number.

It is an amenable number.

144646344977 is a deficient number, since it is larger than the sum of its proper divisors (2413130263).

144646344977 is an equidigital number, since it uses as much as digits as its factorization.

144646344977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675523.

The product of its digits is 48771072, while the sum is 59.

The spelling of 144646344977 in words is "one hundred forty-four billion, six hundred forty-six million, three hundred forty-four thousand, nine hundred seventy-seven".