144613663661 has 2 divisors, whose sum is σ = 144613663662. Its totient is φ = 144613663660.

The previous prime is 144613663637. The next prime is 144613663673. The reversal of 144613663661 is 166366316441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88012495561 + 56601168100 = 296669^2 + 237910^2 .

It is a cyclic number.

It is not a de Polignac number, because 144613663661 - 2²⁶ = 144546554797 is a prime.

It is a super-2 number, since 2×144613663661² (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 (144613663681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72306831830 + 72306831831.

It is an arithmetic number, because the mean of its divisors is an integer number (72306831831).

Almost surely, 2^144613663661 is an apocalyptic number.

It is an amenable number.

144613663661 is a deficient number, since it is larger than the sum of its proper divisors (1).

144613663661 is an equidigital number, since it uses as much as digits as its factorization.

144613663661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 47.

The spelling of 144613663661 in words is "one hundred forty-four billion, six hundred thirteen million, six hundred sixty-three thousand, six hundred sixty-one".