144625520621 has 2 divisors, whose sum is σ = 144625520622. Its totient is φ = 144625520620.

The previous prime is 144625520617. The next prime is 144625520681. The reversal of 144625520621 is 126025526441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109210420900 + 35415099721 = 330470^2 + 188189^2 .

It is a cyclic number.

It is not a de Polignac number, because 144625520621 - 2² = 144625520617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144625520681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72312760310 + 72312760311.

It is an arithmetic number, because the mean of its divisors is an integer number (72312760311).

Almost surely, 2^144625520621 is an apocalyptic number.

It is an amenable number.

144625520621 is a deficient number, since it is larger than the sum of its proper divisors (1).

144625520621 is an equidigital number, since it uses as much as digits as its factorization.

144625520621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 144625520621 in words is "one hundred forty-four billion, six hundred twenty-five million, five hundred twenty thousand, six hundred twenty-one".