144585538381 has 2 divisors, whose sum is σ = 144585538382. Its totient is φ = 144585538380.

The previous prime is 144585538309. The next prime is 144585538387. The reversal of 144585538381 is 183835585441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111739775625 + 32845762756 = 334275^2 + 181234^2 .

It is a cyclic number.

It is not a de Polignac number, because 144585538381 - 2¹³ = 144585530189 is a prime.

It is a super-2 number, since 2×144585538381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144585538387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72292769190 + 72292769191.

It is an arithmetic number, because the mean of its divisors is an integer number (72292769191).

Almost surely, 2^144585538381 is an apocalyptic number.

It is an amenable number.

144585538381 is a deficient number, since it is larger than the sum of its proper divisors (1).

144585538381 is an equidigital number, since it uses as much as digits as its factorization.

144585538381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216000, while the sum is 55.

The spelling of 144585538381 in words is "one hundred forty-four billion, five hundred eighty-five million, five hundred thirty-eight thousand, three hundred eighty-one".