144388676521 has 4 divisors (see below), whose sum is σ = 144436793044. Its totient is φ = 144340560000.

The previous prime is 144388676507. The next prime is 144388676563. The reversal of 144388676521 is 125676883441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50608801296 + 93779875225 = 224964^2 + 306235^2 .

It is a cyclic number.

It is not a de Polignac number, because 144388676521 - 2¹⁵ = 144388643753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144388676321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24053760 + ... + 24059761.

It is an arithmetic number, because the mean of its divisors is an integer number (36109198261).

Almost surely, 2^144388676521 is an apocalyptic number.

144388676521 is the 219385-th hex number.

It is an amenable number.

144388676521 is a deficient number, since it is larger than the sum of its proper divisors (48116523).

144388676521 is an equidigital number, since it uses as much as digits as its factorization.

144388676521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48116522.

The product of its digits is 7741440, while the sum is 55.

The spelling of 144388676521 in words is "one hundred forty-four billion, three hundred eighty-eight million, six hundred seventy-six thousand, five hundred twenty-one".