144533436023621 has 4 divisors (see below), whose sum is σ = 145164586399500. Its totient is φ = 143902285647744.

The previous prime is 144533436023591. The next prime is 144533436023671. The reversal of 144533436023621 is 126320634335441.

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 137371550154721 + 7161885868900 = 11720561^2 + 2676170^2 .

It is a cyclic number.

It is not a de Polignac number, because 144533436023621 - 2¹⁴ = 144533436007237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144533436023671) 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, 315575187596 + ... + 315575188053.

It is an arithmetic number, because the mean of its divisors is an integer number (36291146599875).

Almost surely, 2^{144533436023621} is an apocalyptic number.

It is an amenable number.

144533436023621 is a deficient number, since it is larger than the sum of its proper divisors (631150375879).

144533436023621 is an equidigital number, since it uses as much as digits as its factorization.

144533436023621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631150375878.

The product of its (nonzero) digits is 3732480, while the sum is 47.

The spelling of 144533436023621 in words is "one hundred forty-four trillion, five hundred thirty-three billion, four hundred thirty-six million, twenty-three thousand, six hundred twenty-one".